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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Class 11 knowledge and support exam preparation. Choose a topic below to get started.
| 48451. |
Although fluorineis moreelectronegativethan chlorinebutchlorinecan beconvertedintochlorideion moreeasily as comparedto fluorideion fromfluorine. Explain. |
| Answer» <html><body><p></p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :Sinceelectrongainenthalpyof <a href="https://interviewquestions.tuteehub.com/tag/c1-406235" style="font-weight:bold;" target="_blank" title="Click to know more about C1">C1</a> <a href="https://interviewquestions.tuteehub.com/tag/ismore-1052291" style="font-weight:bold;" target="_blank" title="Click to know more about ISMORE">ISMORE</a> negativethan thatof <a href="https://interviewquestions.tuteehub.com/tag/f-455800" style="font-weight:bold;" target="_blank" title="Click to know more about F">F</a>, thereforemoreenergyis releasedwhen<br/> `C1 toC1^(-)` as compared towhen `F to F^(-)`</body></html> | |
| 48452. |
Although every element is different from every other element, yet some elements have certain similarities. Based upon these similarities, the scientists after numerous attempts were are given. Based upon these multiple choice questions are ultimately sucessful in arranging the various elements into groups or chemical families in such a way that similar elements were put together. This arrangement of elements is calledclassification of elements and this led to the formulation of a periodic table. The periodic table is the most organising principle in chemistry. If you know the properties of any element in a group, or of the columns, of the periodic table, you can make a good guess atthe properties of every other element in the same group and even the elements in the neighbouring groups. The first break through in the classification of elements, was provided by Russian chemist Dmitri lunovich Mendeleev. Taking thechemistry of the elements as his primary organising principle, he arranged the known elements by atomic mass and grouped them together according to their chemical reactivity He also observed that there occurred recurrence of elements with similar physical and chemical properties after certain regular intervals. On the basis of these similarities Mendeleev proposed his periodic law which states that physical and chemical properties of lementsare a periodic function of their atomic masses Moseley suggested that atomic number was a better fundamental property of an element than its atomic mass. This forms the basis of the Modern periodic law. Thus, modern periodiclaw states that physical and chemical properties of the elements are a periodic function of their atomic numbers.In the modern long form of periodic table the elements are arranged in the increasing orderof their atomic numbers and the elements with similar properties repeat after regular intervals. Repetition of chemical properties of elementsat regular intervals when arranged in a definiteorder is called periodicity of properties. This is due the recurrence of similar outer electronic configuration at certain regular intervals. The long form of periodic table may be divided into four main blocks known as s, p, d and f blocks depending upon the type of orbitals being filledup with the increase in atomic number in atoms of the elements. The nature of the block to which an element belongs depends upon the type of subshell which receives the last electron. What is the maximum number of electrons which can be accommodated in an atom in which the highest principal quantum number is 4? |
| Answer» <html><body><p>10<br/>18<br/>36<br/>54</p>Answer :<a href="https://interviewquestions.tuteehub.com/tag/c-7168" style="font-weight:bold;" target="_blank" title="Click to know more about C">C</a></body></html> | |
| 48453. |
Although every element is different from every other element, yet some elements have certain similarities. Based upon these similarities, the scientists after numerous attempts were are given. Based upon these multiple choice questions are ultimately sucessful in arranging the various elements into groups or chemical families in such a way that similar elements were put together. This arrangement of elements is calledclassification of elements and this led to the formulation of a periodic table. The periodic table is the most organising principle in chemistry. If you know the properties of any element in a group, or of the columns, of the periodic table, you can make a good guess atthe properties of every other element in the same group and even the elements in the neighbouring groups. The first break through in the classification of elements, was provided by Russian chemist Dmitri lunovich Mendeleev. Taking thechemistry of the elements as his primary organising principle, he arranged the known elements by atomic mass and grouped them together according to their chemical reactivity He also observed that there occurred recurrence of elements with similar physical and chemical properties after certain regular intervals. On the basis of these similarities Mendeleev proposed his periodic law which states that physical and chemical properties of lementsare a periodic function of their atomic masses Moseley suggested that atomic number was a better fundamental property of an element than its atomic mass. This forms the basis of the Modern periodic law. Thus, modern periodiclaw states that physical and chemical properties of the elements are a periodic function of their atomic numbers.In the modern long form of periodic table the elements are arranged in the increasing orderof their atomic numbers and the elements with similar properties repeat after regular intervals. Repetition of chemical properties of elementsat regular intervals when arranged in a definiteorder is called periodicity of properties. This is due the recurrence of similar outer electronic configuration at certain regular intervals. The long form of periodic table may be divided into four main blocks known as s, p, d and f blocks depending upon the type of orbitals being filledup with the increase in atomic number in atoms of the elements. The nature of the block to which an element belongs depends upon the type of subshell which receives the last electron.The element with atomic number 57 belongs to |
| Answer» <html><body><p>s-block <br/>p-block <br/>d-block <br/>f-block</p>Answer :<a href="https://interviewquestions.tuteehub.com/tag/c-7168" style="font-weight:bold;" target="_blank" title="Click to know more about C">C</a></body></html> | |
| 48454. |
Although every element is different from every other element, yet some elements have certain similarities. Based upon these similarities, the scientists after numerous attempts were are given. Based upon these multiple choice questions are ultimately sucessful in arranging the various elements into groups or chemical families in such a way that similar elements were put together. This arrangement of elements is calledclassification of elements and this led to the formulation of a periodic table. The periodic table is the most organising principle in chemistry. If you know the properties of any element in a group, or of the columns, of the periodic table, you can make a good guess atthe properties of every other element in the same group and even the elements in the neighbouring groups. The first break through in the classification of elements, was provided by Russian chemist Dmitri lunovich Mendeleev. Taking thechemistry of the elements as his primary organising principle, he arranged the known elements by atomic mass and grouped them together according to their chemical reactivity He also observed that there occurred recurrence of elements with similar physical and chemical properties after certain regular intervals. On the basis of these similarities Mendeleev proposed his periodic law which states that physical and chemical properties of lementsare a periodic function of their atomic masses Moseley suggested that atomic number was a better fundamental property of an element than its atomic mass. This forms the basis of the Modern periodic law. Thus, modern periodiclaw states that physical and chemical properties of the elements are a periodic function of their atomic numbers.In the modern long form of periodic table the elements are arranged in the increasing orderof their atomic numbers and the elements with similar properties repeat after regular intervals. Repetition of chemical properties of elementsat regular intervals when arranged in a definiteorder is called periodicity of properties. This is due the recurrence of similar outer electronic configuration at certain regular intervals. The long form of periodic table may be divided into four main blocks known as s, p, d and f blocks depending upon the type of orbitals being filledup with the increase in atomic number in atoms of the elements. The nature of the block to which an element belongs depends upon the type of subshell which receives the last electron. Which of the following pairs of elements belongs to the same period of the periodic table ? |
| Answer» <html><body><p><a href="https://interviewquestions.tuteehub.com/tag/na-572417" style="font-weight:bold;" target="_blank" title="Click to know more about NA">NA</a>,Ca<br/>Mg,Sb<br/>Ca,Cl<br/>Cd,Zn</p>Answer :D</body></html> | |
| 48455. |
Although every element is different from every other element, yet some elements have certain similarities. Based upon these similarities, the scientists after numerous attempts were are given. Based upon these multiple choice questions are ultimately sucessful in arranging the various elements into groups or chemical families in such a way that similar elements were put together. This arrangement of elements is calledclassification of elements and this led to the formulation of a periodic table. The periodic table is the most organising principle in chemistry. If you know the properties of any element in a group, or of the columns, of the periodic table, you can make a good guess atthe properties of every other element in the same group and even the elements in the neighbouring groups. The first break through in the classification of elements, was provided by Russian chemist Dmitri lunovich Mendeleev. Taking thechemistry of the elements as his primary organising principle, he arranged the known elements by atomic mass and grouped them together according to their chemical reactivity He also observed that there occurred recurrence of elements with similar physical and chemical properties after certain regular intervals. On the basis of these similarities Mendeleev proposed his periodic law which states that physical and chemical properties of lementsare a periodic function of their atomic masses Moseley suggested that atomic number was a better fundamental property of an element than its atomic mass. This forms the basis of the Modern periodic law. Thus, modern periodiclaw states that physical and chemical properties of the elements are a periodic function of their atomic numbers.In the modern long form of periodic table the elements are arranged in the increasing orderof their atomic numbers and the elements with similar properties repeat after regular intervals. Repetition of chemical properties of elementsat regular intervals when arranged in a definiteorder is called periodicity of properties. This is due the recurrence of similar outer electronic configuration at certain regular intervals. The long form of periodic table may be divided into four main blocks known as s, p, d and f blocks depending upon the type of orbitals being filledup with the increase in atomic number in atoms of the elements. The nature of the block to which an element belongs depends upon the type of subshell which receives the last electron. An element with electronic configuration 1s^2 2s^2 2p^6 3s^2 3p^6 3d^3 4s^2 can be placed in thegroup |
| Answer» <html><body><p>fifth<br/>fifteen<br/>second <br/><a href="https://interviewquestions.tuteehub.com/tag/third-1414358" style="font-weight:bold;" target="_blank" title="Click to know more about THIRD">THIRD</a> </p><a href="https://interviewquestions.tuteehub.com/tag/answer-15557" style="font-weight:bold;" target="_blank" title="Click to know more about ANSWER">ANSWER</a> :A</body></html> | |
| 48456. |
Although every element is different from every other element, yet some elements have certain similarities. Based upon these similarities, the scientists after numerous attempts were are given. Based upon these multiple choice questions are ultimately sucessful in arranging the various elements into groups or chemical families in such a way that similar elements were put together. This arrangement of elements is calledclassification of elements and this led to the formulation of a periodic table. The periodic table is the most organising principle in chemistry. If you know the properties of any element in a group, or of the columns, of the periodic table, you can make a good guess atthe properties of every other element in the same group and even the elements in the neighbouring groups. The first break through in the classification of elements, was provided by Russian chemist Dmitri lunovich Mendeleev. Taking thechemistry of the elements as his primary organising principle, he arranged the known elements by atomic mass and grouped them together according to their chemical reactivity He also observed that there occurred recurrence of elements with similar physical and chemical properties after certain regular intervals. On the basis of these similarities Mendeleev proposed his periodic law which states that physical and chemical properties of lementsare a periodic function of their atomic masses Moseley suggested that atomic number was a better fundamental property of an element than its atomic mass. This forms the basis of the Modern periodic law. Thus, modern periodiclaw states that physical and chemical properties of the elements are a periodic function of their atomic numbers.In the modern long form of periodic table the elements are arranged in the increasing orderof their atomic numbers and the elements with similar properties repeat after regular intervals. Repetition of chemical properties of elementsat regular intervals when arranged in a definiteorder is called periodicity of properties. This is due the recurrence of similar outer electronic configuration at certain regular intervals. The long form of periodic table may be divided into four main blocks known as s, p, d and f blocks depending upon the type of orbitals being filledup with the increase in atomic number in atoms of the elements. The nature of the block to which an element belongs depends upon the type of subshell which receives the last electron. Which of the following sets of atomic numbers belong to that of alkali metals (group I)? |
| Answer» <html><body><p>12,30,4,62<br/>37,19,3,55<br/>9,17,35,53<br/>12,20,50,88</p>Answer :<a href="https://interviewquestions.tuteehub.com/tag/b-387190" style="font-weight:bold;" target="_blank" title="Click to know more about B">B</a></body></html> | |
| 48457. |
Although every element is different from every other element, yet some elements have certain similarities. Based upon these similarities, the scientists after numerous attempts were are given. Based upon these multiple choice questions are ultimately sucessful in arranging the various elements into groups or chemical families in such a way that similar elements were put together. This arrangement of elements is calledclassification of elements and this led to the formulation of a periodic table. The periodic table is the most organising principle in chemistry. If you know the properties of any element in a group, or of the columns, of the periodic table, you can make a good guess atthe properties of every other element in the same group and even the elements in the neighbouring groups. The first break through in the classification of elements, was provided by Russian chemist Dmitri lunovich Mendeleev. Taking thechemistry of the elements as his primary organising principle, he arranged the known elements by atomic mass and grouped them together according to their chemical reactivity He also observed that there occurred recurrence of elements with similar physical and chemical properties after certain regular intervals. On the basis of these similarities Mendeleev proposed his periodic law which states that physical and chemical properties of lementsare a periodic function of their atomic masses Moseley suggested that atomic number was a better fundamental property of an element than its atomic mass. This forms the basis of the Modern periodic law. Thus, modern periodiclaw states that physical and chemical properties of the elements are a periodic function of their atomic numbers.In the modern long form of periodic table the elements are arranged in the increasing orderof their atomic numbers and the elements with similar properties repeat after regular intervals. Repetition of chemical properties of elementsat regular intervals when arranged in a definiteorder is called periodicity of properties. This is due the recurrence of similar outer electronic configuration at certain regular intervals. The long form of periodic table may be divided into four main blocks known as s, p, d and f blocks depending upon the type of orbitals being filledup with the increase in atomic number in atoms of the elements. The nature of the block to which an element belongs depends upon the type of subshell which receives the last electron. In the periodic table, the element with atomic number 16 will be placed in the group |
| Answer» <html><body><p>fourteen <br/><a href="https://interviewquestions.tuteehub.com/tag/sixteen-3036031" style="font-weight:bold;" target="_blank" title="Click to know more about SIXTEEN">SIXTEEN</a> <br/><a href="https://interviewquestions.tuteehub.com/tag/thirteen-707783" style="font-weight:bold;" target="_blank" title="Click to know more about THIRTEEN">THIRTEEN</a> <br/><a href="https://interviewquestions.tuteehub.com/tag/fifteen-7375746" style="font-weight:bold;" target="_blank" title="Click to know more about FIFTEEN">FIFTEEN</a> </p><a href="https://interviewquestions.tuteehub.com/tag/answer-15557" style="font-weight:bold;" target="_blank" title="Click to know more about ANSWER">ANSWER</a> :<a href="https://interviewquestions.tuteehub.com/tag/b-387190" style="font-weight:bold;" target="_blank" title="Click to know more about B">B</a></body></html> | |
| 48458. |
Although every element is different from every other element, yet some elements have certain similarities. Based upon these similarities, the scientists after numerous attempts were are given. Based upon these multiple choice questions are ultimately sucessful in arranging the various elements into groups or chemical families in such a way that similar elements were put together. This arrangement of elements is calledclassification of elements and this led to the formulation of a periodic table. The periodic table is the most organising principle in chemistry. If you know the properties of any element in a group, or of the columns, of the periodic table, you can make a good guess atthe properties of every other element in the same group and even the elements in the neighbouring groups. The first break through in the classification of elements, was provided by Russian chemist Dmitri lunovich Mendeleev. Taking thechemistry of the elements as his primary organising principle, he arranged the known elements by atomic mass and grouped them together according to their chemical reactivity He also observed that there occurred recurrence of elements with similar physical and chemical properties after certain regular intervals. On the basis of these similarities Mendeleev proposed his periodic law which states that physical and chemical properties of lementsare a periodic function of their atomic masses Moseley suggested that atomic number was a better fundamental property of an element than its atomic mass. This forms the basis of the Modern periodic law. Thus, modern periodiclaw states that physical and chemical properties of the elements are a periodic function of their atomic numbers.In the modern long form of periodic table the elements are arranged in the increasing orderof their atomic numbers and the elements with similar properties repeat after regular intervals. Repetition of chemical properties of elementsat regular intervals when arranged in a definiteorder is called periodicity of properties. This is due the recurrence of similar outer electronic configuration at certain regular intervals. The long form of periodic table may be divided into four main blocks known as s, p, d and f blocks depending upon the type of orbitals being filledup with the increase in atomic number in atoms of the elements. The nature of the block to which an element belongs depends upon the type of subshell which receives the last electron. According to the periodic law of elements, thevariation in properties of elements is related to their |
| Answer» <html><body><p><a href="https://interviewquestions.tuteehub.com/tag/atomic-2477" style="font-weight:bold;" target="_blank" title="Click to know more about ATOMIC">ATOMIC</a> <a href="https://interviewquestions.tuteehub.com/tag/numbers-22758" style="font-weight:bold;" target="_blank" title="Click to know more about NUMBERS">NUMBERS</a> <br/><a href="https://interviewquestions.tuteehub.com/tag/nuclear-2474" style="font-weight:bold;" target="_blank" title="Click to know more about NUCLEAR">NUCLEAR</a> neutron-proton <a href="https://interviewquestions.tuteehub.com/tag/number-582134" style="font-weight:bold;" target="_blank" title="Click to know more about NUMBER">NUMBER</a> ratios<br/>atomic <a href="https://interviewquestions.tuteehub.com/tag/masses-1088822" style="font-weight:bold;" target="_blank" title="Click to know more about MASSES">MASSES</a> <br/>nuclear masses.</p>Answer :A</body></html> | |
| 48459. |
Although every element is different from every other element, yet some elements have certain similarities. Based upon these similarities, the scientists after numerous attempts were are given. Based upon these multiple choice questions are ultimately sucessful in arranging the various elements into groups or chemical families in such a way that similar elements were put together. This arrangement of elements is called classification of elements and this led to the formulation of a periodic table. The periodic table is the most organising principle in chemistry. If you know the properties of any element in a group, or of the columns, of the periodic table, you can make a good guess atthe properties of every other element in the same group and even the elements in the neighbouring groups. The first break through in the classification of elements, was provided by Russian chemist Dmitri lunovich Mendeleev. Taking the chemistry of the elements as his primary organising principle, he arranged the known elements by atomic mass and grouped them together according to their chemical reactivityHe also observed that there occurred recurrence of elements with similar physical and chemical properties after certain regular intervals. On the basis of these similarities Mendeleevproposed his periodic law which states that physical and chemical properties of elementsare a periodic function of their atomic masses Moseley suggested that atomic number was a better fundamental property of an element than its atomic mass. This forms the basis of the Modern periodic law. Thus, modern periodic law states that physical and chemical properties of the elements are a periodic function of their atomic numbers. In the modern long form of periodic table theelements are arranged in the increasing order their atomic numbers and the elements with similar properties repeat after regular intervals. Repetition of chemical properties of elements at regular intervals when arranged in a definite order is called periodicity of properties. This is due the recurrence of similar outer electronic configuration at certain regular intervals. Thelong form of periodic table may be divided into four main blocks known as s, p, d and f blocks depending upon the type of orbitals being filled up with the increase in atomic number in atoms of the elements. The nature of the block to which an element belongs depends upon the type of subshell which receives the last electron. Long form of periodic table is based on the properties of the elements as a function of their |
| Answer» <html><body><p><a href="https://interviewquestions.tuteehub.com/tag/atomic-2477" style="font-weight:bold;" target="_blank" title="Click to know more about ATOMIC">ATOMIC</a> <a href="https://interviewquestions.tuteehub.com/tag/mass-1088425" style="font-weight:bold;" target="_blank" title="Click to know more about MASS">MASS</a> <br/>atomic size<br/>atomic <a href="https://interviewquestions.tuteehub.com/tag/number-582134" style="font-weight:bold;" target="_blank" title="Click to know more about NUMBER">NUMBER</a> <br/><a href="https://interviewquestions.tuteehub.com/tag/none-580659" style="font-weight:bold;" target="_blank" title="Click to know more about NONE">NONE</a> of the above three.</p>Answer :<a href="https://interviewquestions.tuteehub.com/tag/c-7168" style="font-weight:bold;" target="_blank" title="Click to know more about C">C</a></body></html> | |
| 48460. |
Although every element is different from every other element, yet some elements have certain similarities. Based upon these similarities, the scientists after numerous attempts were are given. Based upon these multiple choice questions are ultimately sucessful in arranging the various elements into groups or chemical families in such a way that similar elements were put together. This arrangement of elements is called classification of elements and this led to the formulation of a periodic table. The periodic table is the most organising principle in chemistry. If you know the properties of any element in a group, or of the columns, of the periodic table, you can make a good guess atthe properties of every other element in the same group and even the elements in the neighbouring groups. The first break through in the classification of elements, was provided by Russian chemist Dmitri lunovich Mendeleev. Taking the chemistry of the elements as his primary organising principle, he arranged the known elements by atomic mass and grouped them together according to their chemical reactivityHe also observed that there occurred recurrence of elements with similar physical and chemical properties after certain regular intervals. On the basis of these similarities Mendeleevproposed his periodic law which states that physical and chemical properties of elementsare a periodic function of their atomic masses Moseley suggested that atomic number was a better fundamental property of an element than its atomic mass. This forms the basis of the Modern periodic law. Thus, modern periodic law states that physical and chemical properties of the elements are a periodic function of their atomic numbers. In the modern long form of periodic table theelements are arranged in the increasing order their atomic numbers and the elements with similar properties repeat after regular intervals. Repetition of chemical properties of elements at regular intervals when arranged in a definite order is called periodicity of properties. This is due the recurrence of similar outer electronic configuration at certain regular intervals. Thelong form of periodic table may be divided into four main blocks known as s, p, d and f blocks depending upon the type of orbitals being filled up with the increase in atomic number in atoms of the elements. The nature of the block to which an element belongs depends upon the type of subshell which receives the last electron. In the long form of periodic table, all the non-metals are collectively placed in |
| Answer» <html><body><p>s-block <br/>p-block <br/>f-block <br/>d-block</p>Answer :<a href="https://interviewquestions.tuteehub.com/tag/b-387190" style="font-weight:bold;" target="_blank" title="Click to know more about B">B</a></body></html> | |
| 48461. |
Although dihydrogen is the third most abundant element on the surface of the globe yet it is not found in our atmosphere . Why so ? |
| Answer» <html><body><p></p>Solution :<a href="https://interviewquestions.tuteehub.com/tag/earth-13129" style="font-weight:bold;" target="_blank" title="Click to know more about EARTH">EARTH</a> does not process <a href="https://interviewquestions.tuteehub.com/tag/enough-446095" style="font-weight:bold;" target="_blank" title="Click to know more about ENOUGH">ENOUGH</a> gravitation pull to <a href="https://interviewquestions.tuteehub.com/tag/retain-613969" style="font-weight:bold;" target="_blank" title="Click to know more about RETAIN">RETAIN</a> light `H_(2)` <a href="https://interviewquestions.tuteehub.com/tag/molecules-563030" style="font-weight:bold;" target="_blank" title="Click to know more about MOLECULES">MOLECULES</a>.</body></html> | |
| 48462. |
Although dihydrogen can be prepared by electrolysis of water but in fertilizer industry, dihydrogen needed for making urea is prepared froom natural gas or naphtha. Why so ? |
| Answer» <html><body><p></p>Solution :<a href="https://interviewquestions.tuteehub.com/tag/manufacturing-1086366" style="font-weight:bold;" target="_blank" title="Click to know more about MANUFACTURING">MANUFACTURING</a> of `H_(2)` by electrolysis of water is a <a href="https://interviewquestions.tuteehub.com/tag/highly-2102664" style="font-weight:bold;" target="_blank" title="Click to know more about HIGHLY">HIGHLY</a> expensive process, therefore, in <a href="https://interviewquestions.tuteehub.com/tag/industry-1043031" style="font-weight:bold;" target="_blank" title="Click to know more about INDUSTRY">INDUSTRY</a> , it is manfactured by partial oxidation of natural gas or <a href="https://interviewquestions.tuteehub.com/tag/naphtha-1110683" style="font-weight:bold;" target="_blank" title="Click to know more about NAPHTHA">NAPHTHA</a>. <br/>`underset("Natural gas")(CH_(4)(g)) + underset("<a href="https://interviewquestions.tuteehub.com/tag/ni-578253" style="font-weight:bold;" target="_blank" title="Click to know more about NI">NI</a>")(1270K)to underset("Syn gas")ubrace (CO(g) + 3H_(2)(g))` <br/>`underset("Naphtha")(C_(n)H_(2n+2))+ underset("Steam")(nH_(2)O) underset(Ni) overset(1270K)to nCO + (2n+1)H_(2)` <br/> CO is then removed from syn gas by water gas shift reaction.</body></html> | |
| 48463. |
Although D_(2)O resembles H_(2)O chemically yet is is a toxic substance . Explain. |
| Answer» <html><body><p></p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :`D_(2)O` is toxic <a href="https://interviewquestions.tuteehub.com/tag/since-644476" style="font-weight:bold;" target="_blank" title="Click to know more about SINCE">SINCE</a> , `D^(+)` reacts at a <a href="https://interviewquestions.tuteehub.com/tag/much-2164829" style="font-weight:bold;" target="_blank" title="Click to know more about MUCH">MUCH</a> slower rate as compared to `H^(+)` in enzyme-catalyzed <a href="https://interviewquestions.tuteehub.com/tag/reactions-20919" style="font-weight:bold;" target="_blank" title="Click to know more about REACTIONS">REACTIONS</a>.</body></html> | |
| 48464. |
Although carbocations are alwaysplanar but carbanions and free radicals can assume either planar or pyramidal geometry. Why is it so ? Explain. |
| Answer» <html><body><p></p>Solution :The simple alkyl carbanions are pyramidal. For example, <br/> <img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/PR_CHE_02_XI_C12_E16_016_S01.png" width="80%"/> <br/> However, carbanions in which the C-atom carrying the <a href="https://interviewquestions.tuteehub.com/tag/negative-570381" style="font-weight:bold;" target="_blank" title="Click to know more about NEGATIVE">NEGATIVE</a> charge is adjacent to a double bond or a benzene ring, are planar due to stabilization by <a href="https://interviewquestions.tuteehub.com/tag/resonance-1186596" style="font-weight:bold;" target="_blank" title="Click to know more about RESONANCE">RESONANCE</a>. Thus, allyl and benzyl carbanions are planar. <br/> <img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/PR_CHE_02_XI_C12_E16_016_S02.png" width="80%"/> <br/><img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/PR_CHE_02_XI_C12_E16_016_S03.png" width="80%"/> <br/> Most of the free radicals are planar but free radicals in which the carbon atom carrying the <a href="https://interviewquestions.tuteehub.com/tag/odd-584820" style="font-weight:bold;" target="_blank" title="Click to know more about ODD">ODD</a> <a href="https://interviewquestions.tuteehub.com/tag/electron-968715" style="font-weight:bold;" target="_blank" title="Click to know more about ELECTRON">ELECTRON</a> is connected to a bridge head carbon or highly electronegative element are pyramidal. For examples. `CF_(3)` has pyramidal shape.</body></html> | |
| 48465. |
Although C-D bond is stronger than C-H bond, yet (CH_(3))_(3)C^(+)(i) is more stable than (CD_(3))_(3)C^(+) (ii) Why so ? |
| Answer» <html><body><p></p>Solution :Both carbocations (i) and (ii) are stabilized by hyperconjugation as shown below: <br/> <img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/PR_CHE_02_XI_C12_E16_013_S01.png" width="80%"/> <br/> <img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/PR_CHE_02_XI_C12_E16_013_S02.png" width="80%"/> <br/> Due to stronger C-D bond, <a href="https://interviewquestions.tuteehub.com/tag/contribution-932552" style="font-weight:bold;" target="_blank" title="Click to know more about CONTRIBUTION">CONTRIBUTION</a> of <a href="https://interviewquestions.tuteehub.com/tag/structures-17929" style="font-weight:bold;" target="_blank" title="Click to know more about STRUCTURES">STRUCTURES</a> (V-VIII) towards stability of carbocations, `(CD_(3))_(3)C^(+)` is less than those of structures (I-IV) for carbocation, `(CH_(3))_(3)C^(+)`, therefore, carbocation (i) is more stable than carbocation (ii). This effec is also sometimes called as `beta-` or secondary isotope <a href="https://interviewquestions.tuteehub.com/tag/effect-966056" style="font-weight:bold;" target="_blank" title="Click to know more about EFFECT">EFFECT</a>.</body></html> | |
| 48466. |
Although bothCO_2and H_2 O are triatomic molecules, the shape of H_2 O molecule is bent while that of CO_2 is linear. Explain this on the basis of dipole moment ? |
| Answer» <html><body><p></p>Solution :`CO_2` is a linear in which the two C = are oriented in the opposite directions at an angle of `180^@`. The <a href="https://interviewquestions.tuteehub.com/tag/dipole-440057" style="font-weight:bold;" target="_blank" title="Click to know more about DIPOLE">DIPOLE</a> moment of C =0 is 2.3 D due to linear structure of `CO_2` the bond <a href="https://interviewquestions.tuteehub.com/tag/dipoles-440066" style="font-weight:bold;" target="_blank" title="Click to know more about DIPOLES">DIPOLES</a> of two C = O bonds cancel with each other. Therefore resultant `mu`is zero. On the other <a href="https://interviewquestions.tuteehub.com/tag/hand-1015171" style="font-weight:bold;" target="_blank" title="Click to know more about HAND">HAND</a>, `H_2 O` is polar molecule having dipole moment 1.54 D. Actually `H_2 O` molecule has <a href="https://interviewquestions.tuteehub.com/tag/bent-395665" style="font-weight:bold;" target="_blank" title="Click to know more about BENT">BENT</a> structure in which O-H bonds are oriented at an angle of `104^(0) 5^(1)` and dont cancel the bond moments of each other.</body></html> | |
| 48467. |
Although both CO_2 and H_2O are triatomic molecules.,the shape of H_2O molecular is bent while that of CO_2 is linear. Explain these on the basis of dipole moment. |
| Answer» <html><body><p></p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :Experimental measurement has shown that the <a href="https://interviewquestions.tuteehub.com/tag/dipole-440057" style="font-weight:bold;" target="_blank" title="Click to know more about DIPOLE">DIPOLE</a> moment of `CO_2` is zero. This is possible only if `CO_2` is linear molecule. The two <a href="https://interviewquestions.tuteehub.com/tag/bond-900583" style="font-weight:bold;" target="_blank" title="Click to know more about BOND">BOND</a> <a href="https://interviewquestions.tuteehub.com/tag/dipoles-440066" style="font-weight:bold;" target="_blank" title="Click to know more about DIPOLES">DIPOLES</a> cancel each other giving it a net dipole moment value of zero.</body></html> | |
| 48468. |
CO_(2) and H_(2)Oboth are triatomic molecules but their dipole moment values are different.Why? |
| Answer» <html><body><p></p>Solution :In `CO_(2)` there are two C-0 bonds. Each C=O bond is a <a href="https://interviewquestions.tuteehub.com/tag/polar-1157435" style="font-weight:bold;" target="_blank" title="Click to know more about POLAR">POLAR</a> bond. <br/> The net dipole moment of `CO_(2)` molecule is zero. This is possible only if `C_(2)` is a linear molecule.(O = C = O). The bond dipóles of two C = 0 bonds <a href="https://interviewquestions.tuteehub.com/tag/cancels-908215" style="font-weight:bold;" target="_blank" title="Click to know more about CANCELS">CANCELS</a> the dipole moment of each other. <br/> Whereas, `H_(2)O` molecule has a net dipole moment (1.84 D). `H_(2)O` molecule has a bent structure because here the O - H bonds are <a href="https://interviewquestions.tuteehub.com/tag/oriented-7296784" style="font-weight:bold;" target="_blank" title="Click to know more about ORIENTED">ORIENTED</a> at an angle of `104.5^(@)` and do not cancel the bond dipole moments <a href="https://interviewquestions.tuteehub.com/tag/os-25550" style="font-weight:bold;" target="_blank" title="Click to know more about OS">OS</a> each other.</body></html> | |
| 48469. |
Although both CO_(2) and H_(2)O are triatomic molecules,the shaep of H_(2)O molecule is bent while that of CO_(2) is linear. Explain this on the basis of dipple moment? |
| Answer» <html><body><p></p>Solution :`CO_(2)` is a linear in which the two C=O are oriented in the <a href="https://interviewquestions.tuteehub.com/tag/opposite-1137237" style="font-weight:bold;" target="_blank" title="Click to know more about OPPOSITE">OPPOSITE</a> directions at an angle of `180^(@)`. The dipole moment of C=O is 2.3 D due to linear <a href="https://interviewquestions.tuteehub.com/tag/structure-1230280" style="font-weight:bold;" target="_blank" title="Click to know more about STRUCTURE">STRUCTURE</a> of `CO_(2)` the bond <a href="https://interviewquestions.tuteehub.com/tag/dipoles-440066" style="font-weight:bold;" target="_blank" title="Click to know more about DIPOLES">DIPOLES</a> of two C=O bonds <a href="https://interviewquestions.tuteehub.com/tag/cancel-406753" style="font-weight:bold;" target="_blank" title="Click to know more about CANCEL">CANCEL</a> with each other. Therefore resultant `mu` is zero. <br/> On the other hand `H_(2)O` is polar molecule having dipole moment 1.54 D. Actually `H_(2)O` molecule has bent structure in which O-<a href="https://interviewquestions.tuteehub.com/tag/h-1014193" style="font-weight:bold;" target="_blank" title="Click to know more about H">H</a> bonds are oriented at an angle of `104^(@)5^(1)` and dont cancel the bond moment of each other.</body></html> | |
| 48470. |
Although bothCO_(2) and H_(2) Oare triatomic molecules, the shape of H_(2)Omolecule is bent while that ofCO_(2) is linear . Explain these on the basis of dipole mement. |
| Answer» <html><body><p></p>Solution :The dipole mement <a href="https://interviewquestions.tuteehub.com/tag/studies-1230633" style="font-weight:bold;" target="_blank" title="Click to know more about STUDIES">STUDIES</a> show that the dipole moment of `CO_(2)`molecule is zero . This is <a href="https://interviewquestions.tuteehub.com/tag/possible-592355" style="font-weight:bold;" target="_blank" title="Click to know more about POSSIBLE">POSSIBLE</a> only<br/> if ` CO_(2)`is a linear molecule ` ((O = C=O))` so that diple moment of C-Oare equal and opposite and<br/> <a href="https://interviewquestions.tuteehub.com/tag/hence-484344" style="font-weight:bold;" target="_blank" title="Click to know more about HENCE">HENCE</a> cancel out . On the other hand, `H_(2) O ` molecule is found to have a net dipole moment (1.84 D)<br/>thought it contains 2 O-H bonds . This shows that it is a bent molecule <img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/PR_CHE_01_XI_C04_E04_015_S01.png" width="80%"/></body></html> | |
| 48471. |
Although both CO_(2) and H_(2)O are triatomic molecular , the shape of H_(2)O molecule is bent while that of CO_(2) is liner. Explain this on the bases of dipole moment. |
| Answer» <html><body><p></p>Solution :<a href="https://interviewquestions.tuteehub.com/tag/always-373607" style="font-weight:bold;" target="_blank" title="Click to know more about ALWAYS">ALWAYS</a>, <a href="https://interviewquestions.tuteehub.com/tag/polarity-1157527" style="font-weight:bold;" target="_blank" title="Click to know more about POLARITY">POLARITY</a> of molecule = `({:("The vecotr sum "),("of the dipole"),("moments of "),("various bonds"):})` <br/> Shape of `CO_(2) `: the shpae of `CO_(2)` is linear so its become nonpolar. Practically `CO_(2)` is nonpolar. `(mu = 0 )` <br/> Polarity of molecule = Vectro addition of Dipole moment of all bands inmolecule <br/> `CO_(2)` is linear molecule so it is nonpolar experiment `CO_(2)` is <a href="https://interviewquestions.tuteehub.com/tag/non-580180" style="font-weight:bold;" target="_blank" title="Click to know more about NON">NON</a> polar `(mu = 0 ) CO_(2)` is nonpolar it is indirect thus it shape must be like this vector addition of <a href="https://interviewquestions.tuteehub.com/tag/dipolar-2583580" style="font-weight:bold;" target="_blank" title="Click to know more about DIPOLAR">DIPOLAR</a> becomes zero.<br/> In `CO_(2) " two C" <a href="https://interviewquestions.tuteehub.com/tag/overset-2905731" style="font-weight:bold;" target="_blank" title="Click to know more about OVERSET">OVERSET</a>(rarr)(_)` Obonds are same but if the are in opposite direction than nullify the effect of each other . <br/> `O overset(larr)(_) " C " overset(rarr)(_) O equiv [""^(-delta)O -overset(-2 delta)(C) - O^(-delta) ]^(0)` <br/> `therefore mu = 0 "so , "CO_(2)` is non polar <br/> `H_(2)O : H_(2) O ` is angular `mu` = 1.85 D so it is polar . IN `H_(2) `O .O. is more electronegative than H. <br/> `therefore H - O` bond is polar . `H^(+) o O^(-delta) and H overset(rarr)(_)` son bond has dipole . <br/> The sharp of `H_(2)`O should be like this the net dipole not become zero. <br/> So the arrangement of bond must be angular . Bond angle is `1.4.5^(@) " net " mu = 1.85 D ` <br/> <img src="https://doubtnut-static.s.llnwi.net/static/physics_images/KPK_AIO_CHE_XI_P1_C04_E01_042_S01.png" width="80%"/></body></html> | |
| 48472. |
Although benzene is highly unsaturated it does not undergo addition reactions. The explanation of this can be suggested as |
| Answer» <html><body><p>`<a href="https://interviewquestions.tuteehub.com/tag/pi-600185" style="font-weight:bold;" target="_blank" title="Click to know more about PI">PI</a>`-<a href="https://interviewquestions.tuteehub.com/tag/electrons-969138" style="font-weight:bold;" target="_blank" title="Click to know more about ELECTRONS">ELECTRONS</a> of <a href="https://interviewquestions.tuteehub.com/tag/benzene-895203" style="font-weight:bold;" target="_blank" title="Click to know more about BENZENE">BENZENE</a> <a href="https://interviewquestions.tuteehub.com/tag/ring-1189545" style="font-weight:bold;" target="_blank" title="Click to know more about RING">RING</a> are delocalised<br/>since `pi`-electrons are present inside the ring, addition cannot take place<br/>cyclic structures do not show addition reactions<br/>benzene is not a reactive compound.</p>Solution :`pi`-electrons of benzene ring are delocalised throughout the molecule. This makes the molecule very stable. The stability resists <a href="https://interviewquestions.tuteehub.com/tag/breaking-903912" style="font-weight:bold;" target="_blank" title="Click to know more about BREAKING">BREAKING</a> of double bond for addition.</body></html> | |
| 48473. |
Although benzene is highly unsaturated , it does not undergo addition reactions |
| Answer» <html><body><p></p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :Because of extra <a href="https://interviewquestions.tuteehub.com/tag/stability-651358" style="font-weight:bold;" target="_blank" title="Click to know more about STABILITY">STABILITY</a> due to delocalization of `pi`-electrons, the double <a href="https://interviewquestions.tuteehub.com/tag/bonds-900666" style="font-weight:bold;" target="_blank" title="Click to know more about BONDS">BONDS</a> of benzene usually do not undergo <a href="https://interviewquestions.tuteehub.com/tag/addition-367641" style="font-weight:bold;" target="_blank" title="Click to know more about ADDITION">ADDITION</a> reactions.</body></html> | |
| 48474. |
Although aluminium is above hydrogen in the electrochemical series, it is stable in air and water Why? |
| Answer» <html><body><p></p>Solution :The <a href="https://interviewquestions.tuteehub.com/tag/thin-707663" style="font-weight:bold;" target="_blank" title="Click to know more about THIN">THIN</a> protective film of oxide, `Al_2O_3` is <a href="https://interviewquestions.tuteehub.com/tag/formed-464209" style="font-weight:bold;" target="_blank" title="Click to know more about FORMED">FORMED</a> on the surface of aluminium. <br/> This <a href="https://interviewquestions.tuteehub.com/tag/protects-1170792" style="font-weight:bold;" target="_blank" title="Click to know more about PROTECTS">PROTECTS</a> the metal from further <a href="https://interviewquestions.tuteehub.com/tag/attack-887517" style="font-weight:bold;" target="_blank" title="Click to know more about ATTACK">ATTACK</a> of air and water. Thus the metal is stable in air and water.</body></html> | |
| 48475. |
alpha - D glucose undergoes mütarotation to beta-D glucose in an aqueous solution. If at 298 K there is 60% conversion of alpha - D glucose overset(H_(2)O)(harr) beta-D glucose, then find correct statement |
| Answer» <html><body><p>the <a href="https://interviewquestions.tuteehub.com/tag/conversion-425722" style="font-weight:bold;" target="_blank" title="Click to know more about CONVERSION">CONVERSION</a> is spontaneous<br/>the conversion is non-spontaneons<br/>`DeltaG^(@) = -1.005KJ//"mole"`<br/>`DeltaG = -1.005 KJ//"mole"`</p>Solution :<img src="https://doubtnut-static.s.llnwi.net/static/physics_images/AKS_ELT_AO_CHE_XI_V01_B_C04_E02_091_S01.png" width="80%"/> <br/> `K=(0.6)/(0.4)=1.5` <br/> `Delta <a href="https://interviewquestions.tuteehub.com/tag/g-1003017" style="font-weight:bold;" target="_blank" title="Click to know more about G">G</a>^(@)= -<a href="https://interviewquestions.tuteehub.com/tag/rt-615359" style="font-weight:bold;" target="_blank" title="Click to know more about RT">RT</a> <a href="https://interviewquestions.tuteehub.com/tag/lnk-1076484" style="font-weight:bold;" target="_blank" title="Click to know more about LNK">LNK</a> = -1.005 kJ` <br/> `Delta G^(@) lt 0 implies` spontaneous</body></html> | |
| 48476. |
alpha-D-Glucopyanose and beta-D-Glucopyranose are: |
| Answer» <html><body><p><a href="https://interviewquestions.tuteehub.com/tag/stereoisomers-13555" style="font-weight:bold;" target="_blank" title="Click to know more about STEREOISOMERS">STEREOISOMERS</a> <br/>diastreoisemer <br/>enantiomers<br/>anomers</p>Solution :N//A</body></html> | |
| 48477. |
Alomost the entire mass of an atom is concentrated in the ________. |
| Answer» <html><body><p>proton<br/>electron<br/>nucleus<br/>neutron</p>Answer :<a href="https://interviewquestions.tuteehub.com/tag/c-7168" style="font-weight:bold;" target="_blank" title="Click to know more about C">C</a></body></html> | |
| 48478. |
Almost the entire mass of an atom is concentrated in the ____ |
| Answer» <html><body><p>Proton<br/>electrons<br/>neutrons<br/>nuckeus</p>Answer :<a href="https://interviewquestions.tuteehub.com/tag/c-7168" style="font-weight:bold;" target="_blank" title="Click to know more about C">C</a>::D</body></html> | |
| 48479. |
Almost the entire mass of an atom is concentrated in the __________. |
| Answer» <html><body><p>proton<br/>electrons<br/>neutrons<br/>nucleus</p>Answer :D</body></html> | |
| 48480. |
Almost all compounds of carbon form covalent bonds. Give reason. |
| Answer» <html><body><p></p>Solution :Carbon (<a href="https://interviewquestions.tuteehub.com/tag/z-750254" style="font-weight:bold;" target="_blank" title="Click to know more about Z">Z</a> = 6) have electronic configuration of `<a href="https://interviewquestions.tuteehub.com/tag/1s-283076" style="font-weight:bold;" target="_blank" title="Click to know more about 1S">1S</a>^(<a href="https://interviewquestions.tuteehub.com/tag/2-283658" style="font-weight:bold;" target="_blank" title="Click to know more about 2">2</a>) 2s^(2) 2p^(2)` . It is not possible for the carbon to form <a href="https://interviewquestions.tuteehub.com/tag/either-7265046" style="font-weight:bold;" target="_blank" title="Click to know more about EITHER">EITHER</a> `C^(4+)` or `C^(4-)` ions to attain the nearest noble gas configuration as it requires large amount of energy. This implies that carbon cannot form <a href="https://interviewquestions.tuteehub.com/tag/ionic-1051191" style="font-weight:bold;" target="_blank" title="Click to know more about IONIC">IONIC</a> bond. So almost in all compounds of carbon, it form four covalent bonds.</body></html> | |
| 48481. |
Almost all amides exist in the |
| Answer» <html><body><p><a href="https://interviewquestions.tuteehub.com/tag/solid-1216587" style="font-weight:bold;" target="_blank" title="Click to know more about SOLID">SOLID</a> <a href="https://interviewquestions.tuteehub.com/tag/state-21805" style="font-weight:bold;" target="_blank" title="Click to know more about STATE">STATE</a><br/>liquid state<br/><a href="https://interviewquestions.tuteehub.com/tag/gaseous-467815" style="font-weight:bold;" target="_blank" title="Click to know more about GASEOUS">GASEOUS</a> state<br/>liquid as <a href="https://interviewquestions.tuteehub.com/tag/well-734398" style="font-weight:bold;" target="_blank" title="Click to know more about WELL">WELL</a> as gaseous state</p>Solution :Solid state</body></html> | |
| 48482. |
Allylic bromination of an olefin is : |
| Answer» <html><body><p> Nucleophilic <a href="https://interviewquestions.tuteehub.com/tag/substitution-1231654" style="font-weight:bold;" target="_blank" title="Click to know more about SUBSTITUTION">SUBSTITUTION</a><br/><a href="https://interviewquestions.tuteehub.com/tag/electrophilic-2069434" style="font-weight:bold;" target="_blank" title="Click to know more about ELECTROPHILIC">ELECTROPHILIC</a> substitution<br/>Free <a href="https://interviewquestions.tuteehub.com/tag/radical-616075" style="font-weight:bold;" target="_blank" title="Click to know more about RADICAL">RADICAL</a> substitution <br/>Electrophilic <a href="https://interviewquestions.tuteehub.com/tag/addition-367641" style="font-weight:bold;" target="_blank" title="Click to know more about ADDITION">ADDITION</a> </p>Answer :<a href="https://interviewquestions.tuteehub.com/tag/c-7168" style="font-weight:bold;" target="_blank" title="Click to know more about C">C</a></body></html> | |
| 48483. |
Allyl chloride is hydrolysed more readily than n-propyl chloride. Why? |
| Answer» <html><body><p></p>Solution :<a href="https://interviewquestions.tuteehub.com/tag/allyl-2411923" style="font-weight:bold;" target="_blank" title="Click to know more about ALLYL">ALLYL</a> chloride shows high <a href="https://interviewquestions.tuteehub.com/tag/reactivity-1178275" style="font-weight:bold;" target="_blank" title="Click to know more about REACTIVITY">REACTIVITY</a> because the <a href="https://interviewquestions.tuteehub.com/tag/carbocation-909158" style="font-weight:bold;" target="_blank" title="Click to know more about CARBOCATION">CARBOCATION</a> formed by hydrolysis is <a href="https://interviewquestions.tuteehub.com/tag/stabilised-632895" style="font-weight:bold;" target="_blank" title="Click to know more about STABILISED">STABILISED</a> by resonance while no such stabilisation of carbocation <a href="https://interviewquestions.tuteehub.com/tag/exists-979838" style="font-weight:bold;" target="_blank" title="Click to know more about EXISTS">EXISTS</a> in the case of n-propyl chloride. <br/> <img src="https://d10lpgp6xz60nq.cloudfront.net/physics_images/MOD_SPJ_CHE_XII_P2_C10_E03_082_S01.png" width="80%"/></body></html> | |
| 48484. |
Allyl alcohol + Br_2// C Cl_4 to ? |
| Answer» <html><body><p>`<a href="https://interviewquestions.tuteehub.com/tag/underset-3243992" style="font-weight:bold;" target="_blank" title="Click to know more about UNDERSET">UNDERSET</a>(Br)underset(|)CH_2 - underset(Br)underset(|)CH-underset(<a href="https://interviewquestions.tuteehub.com/tag/oh-585115" style="font-weight:bold;" target="_blank" title="Click to know more about OH">OH</a>)underset(|)CH_2` <br/>`CH_3 - underset(Br)underset(|) overset(Br)overset(|)<a href="https://interviewquestions.tuteehub.com/tag/c-7168" style="font-weight:bold;" target="_blank" title="Click to know more about C">C</a>-underset(OH)underset(|)CH_2 `<br/><img src="https://doubtnut-static.s.llnwi.net/static/physics_images/AKS_ELT_AO_CHE_XI_V01_D_C04_E02_083_O03.png" width="30%"/> <br/>`underset(Br)underset(|)CH_2 - underset(Br)underset(|)CH-underset(Br)underset(|)CH_2` </p>Solution :`CH_2 = CH-CH_2OH + Br_2// C Cl_4 to underset(Br)underset(|)CH_2 - underset(Br)underset(|)CH-underset(OH)underset(|)CH_2"(<a href="https://interviewquestions.tuteehub.com/tag/addition-367641" style="font-weight:bold;" target="_blank" title="Click to know more about ADDITION">ADDITION</a>)"`</body></html> | |
| 48485. |
Alloys are which type of mixture ? |
| Answer» <html><body><p><br/> <br/> </p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :<a href="https://interviewquestions.tuteehub.com/tag/alloys-857990" style="font-weight:bold;" target="_blank" title="Click to know more about ALLOYS">ALLOYS</a> are <a href="https://interviewquestions.tuteehub.com/tag/homogenous-1028795" style="font-weight:bold;" target="_blank" title="Click to know more about HOMOGENOUS">HOMOGENOUS</a> <a href="https://interviewquestions.tuteehub.com/tag/mixture-1098735" style="font-weight:bold;" target="_blank" title="Click to know more about MIXTURE">MIXTURE</a>.</body></html> | |
| 48486. |
Allotropy is the occurence of same element in two or more different physical forms having more or less similar chemical properties but different physical properties. The different forms of the element are called allotropes. Allotropy is due to the difference in the arrangement of atoms in solid state. Allotropes may be crystalline or amorphous Which among the following statements are correct ? |
| Answer» <html><body><p>Aquadag and oildag are made up of graphite<br/>Graphite reacts with conc. `HNO_(3)` to form mellitic acid `C_(6)(<a href="https://interviewquestions.tuteehub.com/tag/cooh-409857" style="font-weight:bold;" target="_blank" title="Click to know more about COOH">COOH</a>)_(6)`<br/>`C_(3)O_(2)` is also toxic like CO<br/>COO is <a href="https://interviewquestions.tuteehub.com/tag/non-580180" style="font-weight:bold;" target="_blank" title="Click to know more about NON">NON</a> poisonious gas </p>Solution :Graphite = Aquadag + <a href="https://interviewquestions.tuteehub.com/tag/oil-1129840" style="font-weight:bold;" target="_blank" title="Click to know more about OIL">OIL</a> dag</body></html> | |
| 48487. |
Allotropy is the occurence of same element in two or more different physical forms having more or less similar chemical properties but different physical properties. The different forms of the element are called allotropes. Allotropy is due to the difference in the arrangement of atoms in solid state. Allotropes may be crystalline or amorphous Among the following statements are incorrect statement(s) is / are |
| Answer» <html><body><p>Of all the elements carbon <a href="https://interviewquestions.tuteehub.com/tag/exhibit-447130" style="font-weight:bold;" target="_blank" title="Click to know more about EXHIBIT">EXHIBIT</a> maximum catenation power<br/>Silanes are less stable than <a href="https://interviewquestions.tuteehub.com/tag/hydrocarbon-1034072" style="font-weight:bold;" target="_blank" title="Click to know more about HYDROCARBON">HYDROCARBON</a> because - I effect of <a href="https://interviewquestions.tuteehub.com/tag/hydrogen-22331" style="font-weight:bold;" target="_blank" title="Click to know more about HYDROGEN">HYDROGEN</a>, decreases the electron density of Si - Si bond<br/>Silicon exhibit more catenation power in halides than in hydrides due to `ppi-ppi` nature<br/>`CS_(<a href="https://interviewquestions.tuteehub.com/tag/2-283658" style="font-weight:bold;" target="_blank" title="Click to know more about 2">2</a>)` is a volatile liquid while `SiS_(2)` is high melting solid due to polymeric structure</p>Solution :Generally Si is more catenation power</body></html> | |
| 48488. |
Allotropy is the occurence of same element in two or more different physical forms having more or less similar chemical properties but different physical properties. The different forms of the element are called allotropes. Allotropy is due to the difference in the arrangement of atoms in solid state. Allotropes may be crystalline or amorphous In which of the following all the atoms are not sp^(3) hybridization |
| Answer» <html><body><p>Diamond<br/><a href="https://interviewquestions.tuteehub.com/tag/carborundum-413353" style="font-weight:bold;" target="_blank" title="Click to know more about CARBORUNDUM">CARBORUNDUM</a><br/>Crystalline silicon<br/>Quartz</p>Solution :<a href="https://interviewquestions.tuteehub.com/tag/sic-643504" style="font-weight:bold;" target="_blank" title="Click to know more about SIC">SIC</a> [Carborundum] `<a href="https://interviewquestions.tuteehub.com/tag/tosp-3832637" style="font-weight:bold;" target="_blank" title="Click to know more about TOSP">TOSP</a>^(<a href="https://interviewquestions.tuteehub.com/tag/3-301577" style="font-weight:bold;" target="_blank" title="Click to know more about 3">3</a>)` <a href="https://interviewquestions.tuteehub.com/tag/hybridisation-16638" style="font-weight:bold;" target="_blank" title="Click to know more about HYBRIDISATION">HYBRIDISATION</a></body></html> | |
| 48489. |
Allene is an example of |
| Answer» <html><body><p><a href="https://interviewquestions.tuteehub.com/tag/conjugated-7673119" style="font-weight:bold;" target="_blank" title="Click to know more about CONJUGATED">CONJUGATED</a> diene<br/><a href="https://interviewquestions.tuteehub.com/tag/cumulated-2040104" style="font-weight:bold;" target="_blank" title="Click to know more about CUMULATED">CUMULATED</a> diene<br/>isolated diene<br/>all of these</p>Solution :Cumulated <a href="https://interviewquestions.tuteehub.com/tag/dienes-439163" style="font-weight:bold;" target="_blank" title="Click to know more about DIENES">DIENES</a> are <a href="https://interviewquestions.tuteehub.com/tag/called-907796" style="font-weight:bold;" target="_blank" title="Click to know more about CALLED">CALLED</a> <a href="https://interviewquestions.tuteehub.com/tag/allenes-2411312" style="font-weight:bold;" target="_blank" title="Click to know more about ALLENES">ALLENES</a></body></html> | |
| 48490. |
Alltransitionelement ared- block elementbut all d- blockelementare nottransition elements Explain. |
| Answer» <html><body><p></p>Solution :Elementin whichthe last electron <a href="https://interviewquestions.tuteehub.com/tag/enters-972302" style="font-weight:bold;" target="_blank" title="Click to know more about ENTERS">ENTERS</a> any one of the five d- orbitalsof theirrespec tive penultimateshells arecalledd-blockelements. Inthe light of thisdefinition Zn ,<a href="https://interviewquestions.tuteehub.com/tag/cd-407381" style="font-weight:bold;" target="_blank" title="Click to know more about CD">CD</a>,Hg and <a href="https://interviewquestions.tuteehub.com/tag/cn-907325" style="font-weight:bold;" target="_blank" title="Click to know more about CN">CN</a> cannot beregarded asd- blockelementsincelast electron inthementersthe s-orbital of their respective ultimate shells ratherthan the d- orbital oftheir respectivepenultimate shells . thereforethese elementshouldberegardedas s- <a href="https://interviewquestions.tuteehub.com/tag/blockelement-2476257" style="font-weight:bold;" target="_blank" title="Click to know more about BLOCKELEMENT">BLOCKELEMENT</a>.Butthe propertiesof theseelementresemblemore the d-blockratherthan s- blockelement( referto <a href="https://interviewquestions.tuteehub.com/tag/ans-363318" style="font-weight:bold;" target="_blank" title="Click to know more about ANS">ANS</a> to Q.1 page `3//61`) . Thereforeto makethe studyof periodicclassification ofelementmorerationalthey arestudied along withd-blockelement. Thuson thebasisof properties alltransitionelementare d-blockelementbut on thebasisof electronicconfigurationall d-blockelementare not a transitionelements</body></html> | |
| 48491. |
All titration which involves the direct titration of Iodine with a reducing agent are grouped under lodimetry. Iodimetry is employed to determine the strength of reducing agent such as sodium thio sulphate I_(2) + 2Na_(2)S_(2)O_(3) rarr 2I^(-)+S_(4)O_(6)^(-) If iodine is liberated as a result of chemical reaction involving oxidation of an idodide ion by a strong oxidizing agent in neutral or acidic medium the liberated iodine is then titrated with reducing agent. This titration is called lodometry. Todometry is used to estimate the strength of oxidizing agent. For example the estimation of Cu^(++)with thiosulphate. Cu^(+ +) +I^(-) Cu_(2)I_(2)+I_(2) , I_(2)+S_(2)O_(3)^(-) rarrS_(4)O_(6)^(-) +I^(-) Starch used as indicator near the end point which form blue colour complex with I_(3)^(-) . The blue colour disappears when10 mL of H_2O_2solution on treatment with KI and titration of liberated I_2required 10 mL of 1 Nhypo . Thus H_2O_2 is : |
| Answer» <html><body><p>1 N<br/>5.6 volume <br/>`<a href="https://interviewquestions.tuteehub.com/tag/17-278001" style="font-weight:bold;" target="_blank" title="Click to know more about 17">17</a> gL^(-1)`<br/>All are correct </p>Solution :No. ofmilli equivalent of `H_(2)SO_(<a href="https://interviewquestions.tuteehub.com/tag/4-311707" style="font-weight:bold;" target="_blank" title="Click to know more about 4">4</a>)=` <br/> No. of milli equivalents of hypo <br/> `10xx N = <a href="https://interviewquestions.tuteehub.com/tag/10-261113" style="font-weight:bold;" target="_blank" title="Click to know more about 10">10</a> xx 1 , N = 1N` <br/>Volume strength =` 5.6 xx N = 5.6 ` <br/> `N = <a href="https://interviewquestions.tuteehub.com/tag/w-729065" style="font-weight:bold;" target="_blank" title="Click to know more about W">W</a>/(CrEW)<a href="https://interviewquestions.tuteehub.com/tag/xx1-1463705" style="font-weight:bold;" target="_blank" title="Click to know more about XX1">XX1</a>` <br/> `W = N xx GEW = 1 xx 17 = 17 g `.lit</body></html> | |
| 48492. |
All transition elements are d-block elements, but all d-block elements are not transition elements. Explain. |
| Answer» <html><body><p></p>Solution :<a href="https://interviewquestions.tuteehub.com/tag/elements-969381" style="font-weight:bold;" target="_blank" title="Click to know more about ELEMENTS">ELEMENTS</a> in which the last electron enters in the d-orbitals are called d-block elements or transition elements. <br/>General outer <a href="https://interviewquestions.tuteehub.com/tag/electronic-968847" style="font-weight:bold;" target="_blank" title="Click to know more about ELECTRONIC">ELECTRONIC</a> configuration is `(n-1) d^(1-10) - ns^(2)`. <br/> Electron configuration of Zn, Cd and Hg is `(n-1)d^(10)ns^(2)` dlons, which do not shows the most of the properties of the d-block elements. <br/> The d-orbitals in these elements are completely <a href="https://interviewquestions.tuteehub.com/tag/filled-2641169" style="font-weight:bold;" target="_blank" title="Click to know more about FILLED">FILLED</a> in the <a href="https://interviewquestions.tuteehub.com/tag/ground-1013213" style="font-weight:bold;" target="_blank" title="Click to know more about GROUND">GROUND</a> state as <a href="https://interviewquestions.tuteehub.com/tag/well-734398" style="font-weight:bold;" target="_blank" title="Click to know more about WELL">WELL</a> as in their common oxidation states. Therefore, they are not regarded as transition elements. Thus, on the basis of properties, all transition elements are d-block elements but on the basis of electronic configuration, all d-block elements are not transition elements.</body></html> | |
| 48493. |
All titration which involves the direct titration of Iodine with a reducing agent are grouped under lodimetry. Iodimetry is employed to determine the strength of reducing agent such as sodium thio sulphate I_(2) + 2Na_(2)S_(2)O_(3) rarr 2I^(-)+S_(4)O_(6)^(-) If iodine is liberated as a result of chemical reaction involving oxidation of an idodide ion by a strong oxidizing agent in neutral or acidic medium the liberated iodine is then titrated with reducing agent. This titration is called lodometry. Todometry is used to estimate the strength of oxidizing agent. For example the estimation of Cu^(++)with thiosulphate. Cu^(+ +) +I^(-) Cu_(2)I_(2)+I_(2) , I_(2)+S_(2)O_(3)^(-) rarrS_(4)O_(6)^(-) +I^(-) Starch used as indicator near the end point which form blue colour complex with I_(3)^(-) . The blue colour disappears whenWhen 159.50g of CuSO_4in a solution is reacted with KI, then the liberated iodine required 100 ml 1 M Na_(2)S_(2)O_3for complete reaction, then what is the percentage purity of sample used in making the solution. |
| Answer» <html><body><p>`<a href="https://interviewquestions.tuteehub.com/tag/10-261113" style="font-weight:bold;" target="_blank" title="Click to know more about 10">10</a>%`<br/>`<a href="https://interviewquestions.tuteehub.com/tag/20-287209" style="font-weight:bold;" target="_blank" title="Click to know more about 20">20</a>%`<br/>` 5%`<br/>` 30%`</p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :eqt.of `CuSO_4` = eqt.of Hypo <br/> `w/(159.5)=(100xx1)` <br/> w = 15.9 <a href="https://interviewquestions.tuteehub.com/tag/g-1003017" style="font-weight:bold;" target="_blank" title="Click to know more about G">G</a><br/> `:. % ` purity `=(15.95)/(159.5)xx100=10%`</body></html> | |
| 48494. |
All titration which involves the direct titration of Iodine with a reducing agent are grouped under lodimetry. Iodimetry is employed to determine the strength of reducing agent such as sodium thio sulphate I_(2) + 2Na_(2)S_(2)O_(3) rarr 2I^(-)+S_(4)O_(6)^(-) If iodine is liberated as a result of chemical reaction involving oxidation of an idodide ion by a strong oxidizing agent in neutral or acidic medium the liberated iodine is then titrated with reducing agent. This titration is called lodometry. Todometry is used to estimate the strength of oxidizing agent. For example the estimation of Cu^(++)with thiosulphate. Cu^(+ +) +I^(-) Cu_(2)I_(2)+I_(2) , I_(2)+S_(2)O_(3)^(-) rarrS_(4)O_(6)^(-) +I^(-) Starch used as indicator near the end point which form blue colour complex with I_(3)^(-) . The blue colour disappears when In the reaction, 2CuSO_(4) +4KI rarrCu_(2)I_(2) + 2K_(2)SO_(4)+I_2the ratio of equivalent weight of CuSO_4to its molecular weight is: |
| Answer» <html><body><p>`<a href="https://interviewquestions.tuteehub.com/tag/1-256655" style="font-weight:bold;" target="_blank" title="Click to know more about 1">1</a>//8`<br/>`1//4`<br/>`1//2`<br/>1</p>Solution :<a href="https://interviewquestions.tuteehub.com/tag/n-568463" style="font-weight:bold;" target="_blank" title="Click to know more about N">N</a> - <a href="https://interviewquestions.tuteehub.com/tag/factors-458933" style="font-weight:bold;" target="_blank" title="Click to know more about FACTORS">FACTORS</a> = 1</body></html> | |
| 48495. |
All the s-block elements of the periodic table are placed in the groups… |
| Answer» <html><body><p><a href="https://interviewquestions.tuteehub.com/tag/ia-1035280" style="font-weight:bold;" target="_blank" title="Click to know more about IA">IA</a> and <a href="https://interviewquestions.tuteehub.com/tag/iia-498454" style="font-weight:bold;" target="_blank" title="Click to know more about IIA">IIA</a> <br/>IIIA and IVA<br/>B sub groups <br/>VA and <a href="https://interviewquestions.tuteehub.com/tag/viia-723645" style="font-weight:bold;" target="_blank" title="Click to know more about VIIA">VIIA</a> </p><a href="https://interviewquestions.tuteehub.com/tag/answer-15557" style="font-weight:bold;" target="_blank" title="Click to know more about ANSWER">ANSWER</a> :a</body></html> | |
| 48496. |
All the s-block and p-block elements excluding 18th group are called .................. elements |
| Answer» <html><body><p>transition<br/><a href="https://interviewquestions.tuteehub.com/tag/representative-1185392" style="font-weight:bold;" target="_blank" title="Click to know more about REPRESENTATIVE">REPRESENTATIVE</a><br/>inner transition<br/>trans uranium<br/></p>Solution :representative</body></html> | |
| 48497. |
All the orbitals used by carbon for the formtion of CH_(4) have |
| Answer» <html><body><p><<a href="https://interviewquestions.tuteehub.com/tag/p-588962" style="font-weight:bold;" target="_blank" title="Click to know more about P">P</a>>same % `P_(<a href="https://interviewquestions.tuteehub.com/tag/x-746616" style="font-weight:bold;" target="_blank" title="Click to know more about X">X</a>)` - <a href="https://interviewquestions.tuteehub.com/tag/character-914164" style="font-weight:bold;" target="_blank" title="Click to know more about CHARACTER">CHARACTER</a> <br/>same % `p_(y)` - character <br/>same `% S` - character <br/>same % p - character</p>Answer :<a href="https://interviewquestions.tuteehub.com/tag/c-7168" style="font-weight:bold;" target="_blank" title="Click to know more about C">C</a>::D</body></html> | |
| 48498. |
All the naturally occurring processes proceed spontaneously in a direction which leads to |
| Answer» <html><body><p><a href="https://interviewquestions.tuteehub.com/tag/decrease-946104" style="font-weight:bold;" target="_blank" title="Click to know more about DECREASE">DECREASE</a> in entropy <br/>increase in enthalpy<br/>increase in <a href="https://interviewquestions.tuteehub.com/tag/free-465311" style="font-weight:bold;" target="_blank" title="Click to know more about FREE">FREE</a> <a href="https://interviewquestions.tuteehub.com/tag/energy-15288" style="font-weight:bold;" target="_blank" title="Click to know more about ENERGY">ENERGY</a> <br/>decrease in free energy </p><a href="https://interviewquestions.tuteehub.com/tag/answer-15557" style="font-weight:bold;" target="_blank" title="Click to know more about ANSWER">ANSWER</a> :D</body></html> | |
| 48499. |
All the naturally occurring processus proceed spontaneously in a direction which leads to _____ |
| Answer» <html><body><p><a href="https://interviewquestions.tuteehub.com/tag/decrease-946104" style="font-weight:bold;" target="_blank" title="Click to know more about DECREASE">DECREASE</a> in <a href="https://interviewquestions.tuteehub.com/tag/entropy-452129" style="font-weight:bold;" target="_blank" title="Click to know more about ENTROPY">ENTROPY</a> <br/><a href="https://interviewquestions.tuteehub.com/tag/increase-1040383" style="font-weight:bold;" target="_blank" title="Click to know more about INCREASE">INCREASE</a> in entropy<br/>increase in <a href="https://interviewquestions.tuteehub.com/tag/free-465311" style="font-weight:bold;" target="_blank" title="Click to know more about FREE">FREE</a> energy<br/>decrease in free energy</p>Answer :D</body></html> | |
| 48500. |
All thelanthanoids inactioniods belongto group …….. Of theperiodictable. |
| Answer» <html><body><p><br/></p><a href="https://interviewquestions.tuteehub.com/tag/solution-25781" style="font-weight:bold;" target="_blank" title="Click to know more about SOLUTION">SOLUTION</a> :<a href="https://interviewquestions.tuteehub.com/tag/na-572417" style="font-weight:bold;" target="_blank" title="Click to know more about NA">NA</a></body></html> | |