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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Chemistry and mathematics best youtube channal Tell me |
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Answer» Best YouTube channel for chemistry physics wallah I would suggest coachengg and e vidyarthi And for mathematics? Hi gm ...yes Ankit u r right ✌️ In Chemestrty physics wallah |
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| 2. |
How does h2o2 behave as bleaching agent |
| Answer» H2O2 or hydrogen peroxide acts as a strong oxidizing agent both in acidic and basic media. When added to a cloth, it breaks the chemical bonds of the chromophores (colour producing agents). Hence, the visible light is not absorbed and the cloth gets whitened. | |
| 3. |
The strongest covalent bond is formed by the overlapping of 1 s and p2 s and s3 p and d4 p and p |
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| 4. |
Hybridisation of( CH3)2CO |
| Answer» Sp3 and sp2 hybridisation | |
| 5. |
Give the iupac name of the following compound:-C6H10=C=O |
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Answer» I have seen your complete Anwer your answer is nice U did not see my complete answer........" i think it is C6H10O i.e. cyclohexanone" hope u got ur answer........??? cyclohexanone is wrong . Because if the C of C=O is included in the parent chain , then it is cyclohexanone. But now parent chain is of 6 C atoms and substituent group is C=O. Sorry sorry......cyclohexanone????? I think it is C6H10O i.e. cyclohexane C6h10 is cyclohexene . I dont know for c6h10=c=o |
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| 6. |
Give the iupac name of the following compound:-C6H6=C=OPlease is urgent!!! |
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Answer» Benzaldehyde Benzaldehyde |
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| 7. |
Why benzene contain alternate bonding? |
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Answer» Resonance is best way to understand that Benzene is the archetypical aromatic compound. It is planar, bond angles=120º, all carbon atoms in the ring are sp2 hybridized, and the pi-orbitals are occupied by 6 electrons. The aromatic heterocycle pyridine is similar to benzene, and is often used as a weak base for scavenging protons. |
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| 8. |
Write different isomers of 5th member of alkyne series |
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Answer» But remember their name should not be same...... 5th member of alkyne is hexyne......u can draw all the isomers of hexyne by changing position of pi bond between the carbon one by one...... |
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| 9. |
Explain N. T. P and S.T.p |
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Answer» Normal temperature and pressure. Standard temperature pressure Ntp is normal temp. And pressure and stp is standard temp and condition |
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| 10. |
What is screening or shielding effect? |
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Answer» Good explained Shielding effect can be defined as a reduction in the effective nuclear charge on the electron cloud, due to a difference in the attraction forces of the electrons on the nucleus. It is also referred to as the screening effect (or) atomic shielding. |
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| 11. |
3 main postulates of vsepr theory |
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Answer» Postulate of vsepr are:-1-The shape of any molecule can be explained by the repulsion between all the electron pairs that are present in the valence shell.2- The repulsion between two lone pairs is greater than the repulsion between a lone pair and a bond pair. Presence of a lone pair on the central atom causes slight distortion of the bond angles from their ideal values.3- The electronegativity difference between the central atom and the other atoms determines the magnitude of repulsion between the bonding pair of electrons. Postulates of Valence Bond Theory\tThe overlapping of two half-filled valence orbitals of two different atoms results in the formation of the covalent bond. The overlapping causes the electron density between two bonded atoms to increase. This gives the property of stability to the molecule.\tIn case the atomic orbitals possess more than one unpaired electron, more than one bond can be formed and electrons paired in the valence shell cannot take part in such a bond formation.\tA covalent bond is directional. Such a bond is also parallel to the region of overlapping atomic orbitals.\tBased on the pattern of overlapping, there are two types of covalent bonds: sigma bond and a pi bond. The covalent bond formed by sidewise overlapping of atomic orbitals is known as pi bond whereas the bond formed by overlapping of atomic orbital along the inter nucleus axis is known as a sigma bond. 1.If the centre atom is surrounded by only bond pair,the structure and shape will be same. 2.If the centre atom is surrounded by both bond pair and lone pair the structure and shape will not be same.3.Lone pair and lone pair repulsion having bond closing tendency while bond pair -bond pair having opening tendency. |
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| 12. |
what is an electron cloud and polarising power ? ? |
| Answer» Polarizing power can be defined as the ability of a cation to attract the electron cloud towards itself. Polarising power is proportional to charge/size. If the size of the cation is small, it will have more charge density and hence its polarising power increases whereas in anions with increase in its size polarisability increases. Also, higher the charge on a cation more is its polarizing power while higher the charge of an anion more is its polarisability.The region of space around the nucleus which describes the probability of finding an electron of given energy in terms of dots is called an electron cloud. | |
| 13. |
What is quacker..??? |
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| 14. |
What if oxigen is not balanced ,in OXIDATION NUMBER method |
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| 15. |
Molar specific heat at constant volume is:- ???? |
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Answer» Hope this will help u bro Specific Heat for an Ideal Gas at Constant Pressure and Volume. This represents the dimensionless heat capacity at constant volume; it is generally a function of temperature due to intermolecular forces. Cv=(1/n dQ/dT) |
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| 16. |
Can someone please tell me that what is the general formula of alkanamides |
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Answer» (Methanamide). Common name-corresponding-ic acid+amide. IUPAC name - corrsponding alkane -e+ amide. Ex--HCONH2---common name -formamide.Iupac name-( methamide). |
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| 17. |
Why hydrogen give +I effect ? |
| Answer» It shifts electrondensity towards carbon. | |
| 18. |
OH-,RO-,CH3COO-,Cl- in order of decreasing order of basic strength |
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| 19. |
Explain resonance structure |
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Answer» Resonance structures have two or more possible electron structures. Often, they are showed with dotted lines or two+ structures with an arrow between them.The electrons distribute themselves evenly between both configurations (probability-wise) so that what we end up is roughly an "average". When a single lewis structure cannot explain all the properties of molecules then more than one lewis structure is hybrid of all the structures ........ |
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| 20. |
What is the second name of nitrogen ? |
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Answer» N2 as di nitrogen nitrogen molecule Second name for nitrogen group is picogen.I actually don\'t know the 2nd name for nitrogen. What ?? Nitrogens second name ?? It has 2nd name first ? Whaat??? |
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| 21. |
Write the relationship between Kp and Kc when will be Kp=Kc |
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Answer» Yes when no. Of moles is 0 then kc=kp And when ∆n=0 then KP=KC Kp = Kc (RT) ^∆n |
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| 22. |
Anyone here?? |
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Answer» Yes ??? Yes we r here??? Yeah |
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| 23. |
I am unable to understamding oraganic chemistry plz if u able then help me ... |
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Answer» I have seen the videos bahut aache se Sanjaye hai Don\'t worry.......i know u are getting confused with IUPAC names ........i am giving u the name of youtube channel it will be very helpful for u .....really it helped me a lot and reduced my confusion.......plz search " pradeep kshetrapal" on youtube i m sure it will help u It is very easy |
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| 24. |
Why calcium take partycipate in bones |
| Answer» Calcium is a major part of tooth and bone and health as well. It makes our bones strong and dense. One can think of his or her ones as the body\'s calcium reservoir. If one does not gets enough calcium in his or her diet, then he body will take it from his or er bones. | |
| 25. |
How many spherical nodes do you expect in a 4s-orbital? |
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Answer» Good answer nancy no of spherical nodes = (n-1) nodes =4-1=3 3 nodes |
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| 26. |
What is the pH of 0.001M HNO3 solution? |
| Answer» its 3 | |
| 27. |
If the partial pressure are taken in atmosphere then what is the value of R? |
| Answer» 0.0821 | |
| 28. |
What happens when pressure is applied on ice? |
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Answer» Practically right hai? Yes that\'s right yakshi. ??? Ice toot jaayegi......??? |
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| 29. |
Anyone have chemistry pt3 paper of class11 kvs |
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Answer» Yes please Do you have ???....if yes then give me.....if anyone have then he/she can also give here.... S with me |
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| 30. |
Why CH2 double bond CH2 is more reactive than CH triple bond CH ? |
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Answer» Because of presence of one sigma and one pi bond in CH2 double bonds and one sigma and two pi bonds in CH triple bonds. We can whole conclude that pi bonds are the weakest bonds and it plays a major in more reactiveness and less reactiveness as CH2 double bond and CH triple bonds . and is much stable as per priority order double bond is reactive as compsred tk triple |
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| 31. |
Properties of Aromatic compounds. |
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Answer» Shows addition and substitution reaction at once Sp2 hybridised , (4n+2)pie e-, one plannar, cyclic |
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| 32. |
Plz explain Hydration enthalpy.....in easy way....??? |
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Answer» Amount of energy required to 1 mole of ion with water Thanks ..... The heat energy released when new bonds are made between the ions and water molecules is known as the hydration enthalpy of the ion. The hydration enthalpy is the enthalpy change when 1 mole of gaseous ions dissolve in sufficient water to give an infinitely dilute solution. Hydration enthalpies are always negative. Hope this will help u yakshi ? Well it the amount of energy released when 1mole of gaseous ions combine with water to form hydrated ions...the hydration enthalpies of alkaline earth metal ions are larger than those of alkali earth metal ion.. ✌️ The change in enthalpy (the amount of heat released) when one mole of gaseous ions form hydrated ions under standard conditions is called hydration enthalpy. |
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| 33. |
What do you mean by tollen\'s reagent? |
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Answer» Your welcome bro Thanks Ankit??? Tollens\' reagent is a chemical reagent used to determine the presence of aldehyde, aromatic aldehyde, and alpha-hydroxy ketone functional groups. The reagent consists of a solution of silver nitrate and ammonia. It was named after its discoverer, the German chemist Bernhard Tollens. This is chemistry question. What is this ? |
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| 34. |
Difine Eletronegative |
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Answer» Electronegativity, symbol χ, is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself. An atom\'s electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus. Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. |
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| 35. |
What do you mean by electro gane enthelpy an shielding effect |
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Answer» shielding effect describes the balance between the pull of electrons on valence electrons and the repulsion forces from inner electrons.The shielding effect explains why valence shell electrons are more easily removed from the atom. The effect also explains atomic size. The more shielding, the further the valence shell can spread out and the bigger atoms will be. Electron gain enthalpy of an element is the energy released when a neutral isolated gaseous atom accepts an extra electron to form the gaseous negative Ion i.e. anion. We can denote it by Δ egH. Greater the amount of energy released in the above process, higher is the electron gain enthalpy of the element. |
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| 36. |
Anhydrous AlCl3 is covalent in nature but hydrated AlCl3 is ionic? Explain |
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Answer» Please confirm my answer is correct or not This will help u Priya This change from covalent to ionic happens bcoz the ions are hydrated and the amount of hydration energy evolved exceed the ionization energy. |
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| 37. |
Effect of branching of alkane chain on its boiling point. |
| Answer» becoz of the presence of branches the surface area and van der walls forces of attraction are very weak . Therefore the b.p decreases. | |
| 38. |
What is the passing criteria for class 11 PCM + Cs |
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Answer» yup mostly schools may yhi criteria hai.. ? Mere school me bhi same hai Darshana 36% or something like that. It depends upon ur school. Overall percentage in my school for passing is around 60% for passing u have to get at least passing marks in all the subject which is set by school according to my school each student should have at least 33 mark in each subject then he or she will be promoted to next class.. |
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| 39. |
Why there is not 4 bonds between carbon and carbon |
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| 40. |
How many moles are there in 6g of mg? |
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Answer» 0.24686 moles moles its 0 .24686 |
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| 41. |
Why lif is insolube but licl is soluble in water |
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Answer» Nice answer Nancy and ayushi LiF is almost insoluble in water due to high lattice energy. But LiCl is soluble in water due to high hydration energy of Li+ ion. ... covalent character increases when increases the size of anion , that\'s why LiCl is soluble in acetone ( covalent compound ) but LiF is insoluble in acetone . hopes it help you LiF is insoluble in water. On the contrary, LiCl is soluble not only in water, but also in acetone.Reason:This is mainly because of the greater ionic character of LiF as compared to LiCl. The solubility of a compound in water depends on the balance between lattice energy and hydration energy. Since fluoride ion is much smaller in size than chloride ion, the lattice energy of LiF is greater than that of LiCl. Also, there is not much difference between the hydration energies of fluoride ion and chloride ion. Thus, the net energy change during the dissolution of LiCl in water is more exothermic than that during the dissolution of LiF in water. Hence, low lattice energy and greater covalent character are the factors making LiCl soluble not only in water, but also in acetone. Have high lattice enthalpy |
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| 42. |
What is entalpy |
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Answer» Nice answer Ayushi Enthalpy is a thermodynamic quantity equivalent to the total heat content of a system.It is equal to the internal energy of the system plus the product of pressure and volume. Enthalpy is a property of a thermodynamic system, is equal to the system\'s internal energy plus the product of its pressure and volume. |
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| 43. |
What is diffrence between combustion of aliphatic and aromatic compounds |
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| 44. |
State modern periodic law? |
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Answer» Modern Periodic Law: It states that "The physical and chemical properties of the elements are the periodic function of their atomic numbers."According to this law, if we arrange the elements on basis of their increasing atomic numbers, we find that the elements with similar physical and chemical behavior will be grouped together after a certain interval of elements.Here, the "periodic function" is used because the properties of elements are repeated after a periodic time (i.e. after a fix no. of elements) with atomic numbers. The properties of elements are periodic function of their atomic number |
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| 45. |
Explain synthesis resin method for removing permanent hardness of water |
| Answer» Synthetic resins method is a method used for removing permanent hardness of water. In this method ion exchange resins (RSO3H) is changed to RNa by treating it with NaCl. Then, RNa exchanges Na+ ions with Ca2+ and Mg2+ \xa0ions present in hard water and as a result, hard water is softened.2RNa (s) + Mg2+(aq) → R2M(s) + 2 Na+(aq) | |
| 46. |
What is anti-markownikov\'s rules ? |
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Answer» The rule says that in every addition reaction across the unsymmetrical double bond , the negative part of addendum molecule goes to that carbon atom having greatest no. of HYDROGEN. anti markovnikov\'s rule means the hydrogen will be add to the carbon atom which has less number of hydrogen atom. |
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| 47. |
Hoffman bromamide degradation rraction |
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| 48. |
Arrange the following in increasing atomic size and decreasing ionisation enthalpy??Ga, Al, B, Tl |
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Answer» B ,Ga,Al,Tl. Ionisation enthalpy of the group 13 elements is not regular. Here is the order of the first IE of these elements-B > Tl > Ga > Al > In |
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| 49. |
express the relation of solubility products and solubility of Ba(PO4)2 |
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Answer» Solubility= cube root of (solubility product÷4) S= cube root of(ksp÷4) |
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| 50. |
What is the limitation of 2nd law of thermodynamics |
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