InterviewSolution
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InterviewSolution
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.
| 1501. |
What is electroconfiguration |
| Answer» It is defined as the distribution of electrons in different sub shell or orbitals.<br>To show the electron in any element in shell and sub shell | |
| 1502. |
What is the meaning of isotopes and radio isotope? |
| Answer» Isotopes are atoms that have the same number of protons and electrons but different numbers of neutrons and therefore have different physical properties<br>Radioactive isotope, also called radioisotope, or radionuclide, , any of several species of the same chemical element with different masses whose nuclei are unstable and dissipate excess energy by spontaneously emitting radiation in the form of alpha, beta, and gamma rays. | |
| 1503. |
What are the physical significance of vanderwaal. paramaters |
| Answer» Significance of van der Waals’ parameter ‘a’:It is the measure of the magnitude of attractive forces between the molecules of a gas.Unit: atm L2 mol−2 or bar L2 mol−2Larger the value of ‘a’, larger will be the intermolecular force of attraction.It is independent of pressure and temperature.Significance of van der Waals’ parameter ‘b’:It is the measure of the effective size of gas molecules.Unit: L mol−1 | |
| 1504. |
What is the value of enthalpies of all elements in thier standard statw ? |
| Answer» Zero Because at standard state all elements have zero enthalpy of formation ( elements like oxygen , nitrogen in from of gases , solid carbon in form of graphite etc | |
| 1505. |
How to calculate magnetic behaviour of an element fromMOT? |
| Answer» Magnetic behaviour decided by 2 factors :-1.ParamagnetismElements in which unpaired valence electrons are present .2.DimagneticElements in which the valence shell is filled .Ex-Zn | |
| 1506. |
Why h20 is liquid and h2s is gas? |
| Answer» he hydrogen bonding in water causes the water molecules to be associated with each other due to intermolecular forces of attraction, whereas in the case of hydrogen sulphide, these forces of attraction area much weaker.So, lesser energy is required to overcome the forces of interaction between the hydrogen sulphide molecules than those between water molecules. This energy is available at room temperature and hence, hydrogen sulphide is a gas, while water is still a liquid. | |
| 1507. |
What is the valency of fluorine |
| Answer» Oh no. Valency of fluorine is 1<br>-1<br>7<br>7 | |
| 1508. |
Examples of natural organic compounds |
| Answer» | |
| 1509. |
Why soil is not in the periodic table |
| Answer» It is a mixture<br>It will s a compound which have several elements so it is not a element so it is not present in table<br>Dont ask silly questions....<br>Answer for your question is that, soil is an abiotic particle that doesn\'t show any metallic or non metallic features<br>Then answer me why u are not in periodic table<br>Becoz it is not an element<br>I don\'t know | |
| 1510. |
What is the use of chromatography |
| Answer» Chromatography is used to figure out the relation of different mixtures with one another.It is very effective technique to test the purity of the sample.The amount of mixture present in a sample can be calculated by using chromatography.Chiral compounds which are very similar in molecular weight, elemental composition, and physical properties and differ only in optical isomers can be separated using chromatography.It is used for the separation of mixture of compounds. Paper chromatography is particularly very effective in detection and separation of mixture of compounds. | |
| 1511. |
Structure of 2 -2 dimethlyhexane |
| Answer» THE STRUCTURE IS: CH3 CH3CH2CH2CH2-C-CH3 CH3<br>CH3 |CH3-CH2-CH2-CH2-C-CH3 | CH3 | |
| 1512. |
How to get full marks in chem !!??? |
| Answer» Just only by self study and practicing | |
| 1513. |
Can i get imp question on thermo? |
| Answer» yes take it from google or in this app given | |
| 1514. |
Mention the cause of formation of H–Bond |
| Answer» Attraction between hydrogen and other more electronegative elements like flourine , sulphur,oxygen<br>Due ti dipole | |
| 1515. |
What is Syneresis and Occlusion |
| Answer» | |
| 1516. |
is syallabus for 12th nxt year reducing?? |
| Answer» Really<br>yeah because some chapters are reduce from 12th nd added in 11th.<br>Yeah,... I think so | |
| 1517. |
Maginta |
| Answer» | |
| 1518. |
Unlike In+, Tl+ is more stable with respect to disproportionation. Explain |
| Answer» | |
| 1519. |
what is inductive effect?? |
| Answer» | |
| 1520. |
What is the weight of 1 molecule of H^2 |
| Answer» | |
| 1521. |
What is electrolyte |
| Answer» Electrolyte is a substance which produces the electrically conducting solution when get dissolved in polar solvent such as water.... Examples :- Na, Mg, Ca,... etc.. | |
| 1522. |
Why do the C-C bonds rather than the C-H bonds break during the pyrolysis of alkanes? |
| Answer» Yes this is right.<br>C-H.It is because the bond length between Carbon and Hydrogen is smaller (Hydrogen radii is smaller that\'s why) than between Carbon and Carbon, so more energy is needed for atomization as the effective nuclear charge on the bonded pair of electrons will be greater | |
| 1523. |
Who us the father of chemistry |
| Answer» Antoine Lavoisier | |
| 1524. |
How to deal with redox reaction |
| Answer» Spelling mistakes reduction + oxidation = redox reaction<br>Reation + oxidation = redox reaction | |
| 1525. |
What are uses of hydrogen |
| Answer» 1) used in manufacture of metal hydrides and hydrogen chloride2) used to reduce heavy metals oxides to metals and used as a rocket fuel in space research | |
| 1526. |
What is dynamic equilibria |
| Answer» At which reaction rate and product rate are at equilibrium | |
| 1527. |
Define the law of multiple proportion with ex. |
| Answer» When 2 elements combined together to form compound, then then the weight of the element combined with the fixed weight of another element bear a simple whole number ratio... | |
| 1528. |
What is Henry law |
| Answer» Extremely informative abhiveer.<br>Law proposed by henry | |
| 1529. |
why in NaBH4 oxidation no of B is -3 |
| Answer» Let the oxidation number of B in NaBH4 is xthen, oxidation number of Na+oxidation number of B+oxidation number of H=net charge on NaBH4=1+x+(-1)4=0=x-4+1=0x=+3 | |
| 1530. |
How did Mendeleev\'s periodic table help in predicting new elements |
| Answer» Bcoz he left some places for elements to put new introduce elements | |
| 1531. |
Which element of s block doesn\'t react with water.....??? |
| Answer» Be.<br>Be | |
| 1532. |
What do you mean by dual behaviour of matter? |
| Answer» Dual behaviour of matter means matter has both particle as well as wave like properties. | |
| 1533. |
What is the difference between reductant agent and reduction according to concept of electron |
| Answer» Thanks bro<br>Difference between reductant agent and reduction is:- In reduction, gain of electron take place but in case of reluctant agent,.. The species which loss electron itself to make the gain of electron for other one... | |
| 1534. |
The concerntration of hydrogen ionization of a soft drink is 3.8×10-8M calculate its ph |
| Answer» pH =-log (H+ ion)=-log (3.8×10^-8)=-[log (3.8)+log(10^-8)]=-[-7.42]=7.42 | |
| 1535. |
Anybody have blueprint of half yearly chemistry class 11 kv |
| Answer» | |
| 1536. |
What is hybridisation of PH3 |
| Answer» Sp3<br>Sp3 | |
| 1537. |
What is the difference in the orbital angular momentum of 2p and 3p electron ? Explain |
| Answer» Both are same | |
| 1538. |
What is catylist |
| Answer» Catalyst provides lowest energy path for reaction by decreasing activation energy.<br>Those substances which increase the rate of reaction without taking part in it.<br>Without being used in the reaction........!<br>Those substance which alter the rate of a reaction are called catalysts. | |
| 1539. |
What is skotki defect and frankel defect? |
| Answer» Frenkel is a type of defect in crystalline solids where in an atom is displaced from its lattice position to an interstitial site, creating a vacancy at the original site and an interstitial defect at the new location without any changes in chemical properties<br>Schottky defect occurs when oppositely charged atoms (cation and anion) leave their corresponding lattice sites and create a pair of Vacancy Defects. | |
| 1540. |
Define ferimagnetism, feromegnatism and antiferomegnatism |
| Answer» Ferro magnetic: the magnetic materials which show permanent magnetism even when the magnetic field is removed.They contain unpaired electrons in maximum number aligned in only ond direction .Ex: Ni Co FeAnti ferromagnetic: in this magnetic moments of materials are aligned in such a wat that net magnetic moment becomes zero.Ex: MnOFerrimagnetic:In this magnetic moments of the materials are aligned in parallel and anti parallel directions in unequal numbers.These materials loose their magnetism on heating and becomes paramagnetic.Ex:Fe3O4, ZnFe2O4,MgFe2O4 | |
| 1541. |
What is common ion effect and its application |
| Answer» | |
| 1542. |
InCl undergoes disproportionation reaction why |
| Answer» Yes Cl goes under disproportionation reaction | |
| 1543. |
calculate the mass of chlorine |
| Answer» It is 35.5 | |
| 1544. |
Is it imp to pass class 11 half yearly.....to get promoted......??CBSE |
| Answer» Annual is imp. half yearly is not so.<br>Nopes<br>Yes | |
| 1545. |
What is oxidation number???? |
| Answer» The charge that an atom of the element possess in its ions or appear when present in combine state with the other atom<br>oxidation number, assigned to element in chemical combination which represents number of electrons lost, by atom of that element in compound | |
| 1546. |
CBSE has added a new chapter i.e.solid state |
| Answer» Yes | |
| 1547. |
Which topics are cancel |
| Answer» See the full syllabus | |
| 1548. |
R-S configuration of Br, Cl, OH, COOH. |
| Answer» | |
| 1549. |
What are the uses of alkali metal? |
| Answer» Very nice answer<br>\tLithium is used in heat resistive ceramics and glasses.\tAlloy of Lithium is used in aircraft building.\tSodium is used as luster in metals.\tLiquid Sodium is used as coolant in Nuclear reactors.\tPotassium chloride is essential for the growth of plants. It is used in fertilizers.\tPotash improves water retention, yield, nutrient value, taste, color, texture and disease resistance of food crops.\tRubidium 82 is used in myocardial perfusion.\tRubidium is used in the manufacture of atomic clocks, electronic tubes, photocells.\tCesium-134 is used in nuclear power industry.\tCesium in photoelectric cells due to its quick electron emission.\tFrancium is mainly used for scientific research in laboratory. It decays quickly as it has short half life.<br>Like CH2 CH4 etc | |
| 1550. |
Why are sigma bond is stronger than pi bond? |
| Answer» The strength of a bond depends on upon the extent of overlapping. A sigma bond stronger than a pi bond. The reason behind this is the orientation of the overlapped orbitals. Sigma bonds result from head-on(co-axial) overlapping while pi bonds are the outcome of lateral(para-axial) overlapping.\xa0The greater the extent of overlapping, the higher the probability of finding the valence electrons in between the nuclei and hence the bond will be stronger.<br>Because in sigma bond overlapping is quite large as compaired to pi bond | |