46295 + Interview Questions in Chemistry

1.	The correct order of increasing bond angles in the following triatomic species is (a) NO2+
Answer» The correct order of increasing bond angles in the following triatomic species is (a) NO2+

Discussion

2.	Glycerol reacts with P4 + I2 to form (a)aldehyde (b)allyl alcohol (c)allyl iodid (d)acetylene
Answer» Glycerol reacts with P4 + I2 to form (a)aldehyde (b)allyl alcohol (c)allyl iodid (d)acetylene

Discussion

3.	List all allotropes of carbon.
Answer» List all allotropes of carbon.

Discussion

4.	Tranquilizers are substances used for the treatment of:
Answer» Tranquilizers are substances used for the treatment of:

Discussion

5.

Match List-I with List-IIList-IList-II(a) NaOH(i) Acidic(b) Be(OH)2(ii)Basic(c)Ca(OH)2(iii) Amphoteric(d) B(OH)3 (e) Al(OH)3 Choose the most appropriate answer from the options given below :

Answer»

Match List-I with List-II

List-I	List-II
(a) $N a O H$	(i) Acidic
(b) $B e (O H)_{2}$	(ii)Basic
(c) $C a (O H)_{2}$	(iii) Amphoteric
(d) $B (O H)_{3}$
(e) $A l (O H)_{3}$

Choose the most appropriate answer from the options given below :

Discussion

6.	A light vertical rod is given a slight jerk.locus of particles of the rod?
Answer» A light vertical rod is given a slight jerk.locus of particles of the rod?

Discussion

7.	What happens when alcohols reacts with ethers
Answer» What happens when alcohols reacts with ethers

Discussion

8.	How to calculate bond enthalpy?
Answer» How to calculate bond enthalpy?

Discussion

9.	The colour of Cu(I) salts is
Answer» The colour of Cu(I) salts is

Discussion

10.	Find the longitudinal stress applied to a steel wire to stretch it by 0.025 % of its original length, if the ratio of longitudinal stress and strain is 9×1010 Nm−2.
Answer» Find the longitudinal stress applied to a steel wire to stretch it by $0.025 %$ of its original length, if the ratio of longitudinal stress and strain is $9 \times 10^{10} {Nm}^{- 2}$ .

Discussion

11.	Reaction of Br2 with Na2CO3 in aqueous solution gives sodium bromide and sodium bromate with evolution of CO2 gas. The number of sodium bromide molecules involved in the balanced chemical equation is ___
Answer» Reaction of $B r_{2}$ with $N a_{2} C O_{3}$ in aqueous solution gives sodium bromide and sodium bromate with evolution of $C O_{2}$ gas. The number of sodium bromide molecules involved in the balanced chemical equation is ___

Discussion

12.	Acetate rayon is prepared from
Answer» Acetate rayon is prepared from

Discussion

13.	The ionisation energy of hydrogen atom in its ground state is 13.6 eV. The energy released (in eV) for the third line of Balmer series is:
Answer» The ionisation energy of hydrogen atom in its ground state is $13.6 eV$ . The energy released (in $eV$ ) for the third line of Balmer series is:

Discussion

14.	Which one of the following is most electropositive and why?a)Clb)Oc)Ald)BeWhy Al and not Be
Answer» Which one of the following is most electropositive and why? a)Cl b)O c)Al d)Be Why Al and not Be

Discussion

15.	Equal volumes of three acid solutions of pH-3,4 and 5 are mixed in a vessel. What will be the H+ ion concentration in the mixture?
Answer» Equal volumes of three acid solutions of pH-3,4 and 5 are mixed in a vessel. What will be the H+ ion concentration in the mixture?

Discussion

16.	nthalf life of radioactive decay of c14 is 5730 years .how much time it will take so that 25%of c14 was found in sample?n
Answer» nthalf life of radioactive decay of c14 is 5730 years .how much time it will take so that 25%of c14 was found in sample?n

Discussion

17.	Which of the following will give Cannizzaro’s reaction?
Answer» Which of the following will give Cannizzaro’s reaction?

Discussion

18.	in arrhenius equation for a certain reaction ; the value of A and Ea are 4×10 raised to power 13 and 98.67 kJ / mol respectively .if the reaction is of first order ; then at what temp will its half period be 10 min ?
Answer» in arrhenius equation for a certain reaction ; the value of A and Ea are 4×10 raised to power 13 and 98.67 kJ / mol respectively .if the reaction is of first order ; then at what temp will its half period be 10 min ?

Discussion

19.	how to solve log 23
Answer» how to solve log 23

Discussion

20.	Ozonolysis of alkenes gives ozonide which gives aldehydes and/or ketones. When a stream of O3 is passed through a solution of alkene in an inert solvent at low temperature, the molecule adds up to form ozonide. This ozonide is unstable and easily decomposes either by reduction or hydrolysis and forms compound having the carbonyl group >C=O. This is known as ozonolysis. 2-Methyl-but-2-ene on ozonolysis followed by reductive hydrolysis gives:
Answer» Ozonolysis of alkenes gives ozonide which gives aldehydes and/or ketones. When a stream of $O_{3}$ is passed through a solution of alkene in an inert solvent at low temperature, the molecule adds up to form ozonide. This ozonide is unstable and easily decomposes either by reduction or hydrolysis and forms compound having the carbonyl group $> C = O$ . This is known as ozonolysis. 2-Methyl-but-2-ene on ozonolysis followed by reductive hydrolysis gives:

20.

Ozonolysis of alkenes gives ozonide which gives aldehydes and/or ketones. When a stream of O3 is passed through a solution of alkene in an inert solvent at low temperature, the molecule adds up to form ozonide. This ozonide is unstable and easily decomposes either by reduction or hydrolysis and forms compound having the carbonyl group >C=O. This is known as ozonolysis. 2-Methyl-but-2-ene on ozonolysis followed by reductive hydrolysis gives:

Answer»

Ozonolysis of alkenes gives ozonide which gives aldehydes and/or ketones. When a stream of $O_{3}$ is passed through a solution of alkene in an inert solvent at low temperature, the molecule adds up to form ozonide. This ozonide is unstable and easily decomposes either by reduction or hydrolysis and forms compound having the carbonyl group $> C = O$ . This is known as ozonolysis. 2-Methyl-but-2-ene on ozonolysis followed by reductive hydrolysis gives:

Discussion

21.	What is aromaticity and huckle rule ?
Answer» What is aromaticity and huckle rule ?

Discussion

22.	What is the oxidation state of F in Of2 and O2F2??
Answer» What is the oxidation state of F in Of2 and O2F2??

Discussion

23.	38.What will be the major product of cross aldol condensation of ethanal and propanal.
Answer» 38.What will be the major product of cross aldol condensation of ethanal and propanal.

Discussion

24.	For a solution to form positive deviation,the solute-solvent interactions must be less than solute-solute and solvent-solvent interactions,making it easier for the molecules to escape in its pure form.still,why does the vapour pressure of the solution showing positive deviation increase compared to the pure form?
Answer» For a solution to form positive deviation,the solute-solvent interactions must be less than solute-solute and solvent-solvent interactions,making it easier for the molecules to escape in its pure form.still,why does the vapour pressure of the solution showing positive deviation increase compared to the pure form?

Discussion

25.	The correct statement regarding electrophile is
Answer» The correct statement regarding electrophile is

Discussion

26.	Hybridisation of silicon in silica is .
Answer» Hybridisation of silicon in silica is .

Discussion

27.	If wavelength max is 6563 A^° foe balmer series for a particular atom then wavelength pf second line for balmer series is?
Answer» If wavelength max is 6563 A^° foe balmer series for a particular atom then wavelength pf second line for balmer series is?

Discussion

28.	find the pH of 0.5M HF(ka =2\ast10^{-4}) 4 2 3 2.
Answer» find the pH of 0.5M HF(ka =2\ast10^{-4}) 4 2 3 2.

Discussion

29.	A certain amount of a metal whose equivalent massis 28 displaces 0.7 L of H2 at S.T.P. from an acid hence mass of the element is
Answer» A certain amount of a metal whose equivalent massis 28 displaces 0.7 L of H2 at S.T.P. from an acid hence mass of the element is

Discussion

30.	LET A=[3 1 THEN SUM OF ALL THE ELEMENTS OF A^50 -16 -5]
Answer» LET A=[3 1 THEN SUM OF ALL THE ELEMENTS OF A^50 -16 -5]

Discussion

31.	The IUPAC name of the compound
Answer» The IUPAC name of the compound

Discussion

32.	calculate molality of an aqueous solution where moles of solute are 0.4
Answer» calculate molality of an aqueous solution where moles of solute are 0.4

Discussion

33.	The solubility product of BaCrO4 is 2.4×10−10 M2. The maximum concentration of Ba(NO3)2 possible without precipitation in a 6×10−4 M K2CrO4 solution is
Answer» The solubility product of $B a C r O_{4}$ is $2.4 \times 10^{- 10} M^{2}$ . The maximum concentration of $B a (N O_{3})_{2}$ possible without precipitation in a $6 \times 10^{- 4} M K_{2} C r O_{4}$ solution is

Discussion

34.	Select the most stable carbocation among the following
Answer» Select the most stable carbocation among the following

Discussion

35.	do Representative elements also include noble gases?
Answer» do Representative elements also include noble gases?

Discussion

36.	For the reaction, PCl5(g)⇌PCl3(g)+Cl2(g), the degree of dissociation 'x' is related to pressure 'P(x<<1)
Answer» For the reaction, $P C l_{5} (g) ⇌ P C l_{3} (g) + C l_{2} (g)$ , the degree of dissociation 'x' is related to pressure 'P(x<<1)

Discussion

37.	4.5 g water is added into an oleum sample labelled as 109% H2SO4. What is the amount of free SO3 remaining in the solution?
Answer» $4.5 g$ water is added into an oleum sample labelled as $109 % H_{2} S O_{4} .$ What is the amount of free $S O_{3}$ remaining in the solution?

Discussion

38.	Why axial bond pairs suffer more repulsive interaction from the equatorial bond pairs
Answer» Why axial bond pairs suffer more repulsive interaction from the equatorial bond pairs

Discussion

39.	Integral dx/(3x+5) = ?
Answer» Integral dx/(3x+5) = ?

Discussion

40.	Calculate the radius of the third orbit of a hydrogen atom; the radius of the first Bohr orbit of hydrogen atom is 0.53 Å.
Answer» Calculate the radius of the third orbit of a hydrogen atom; the radius of the first Bohr orbit of hydrogen atom is 0.53 Å.

Discussion

41.	Cos 20° cos 40° cos 60° cos 80° =
Answer» Cos 20° cos 40° cos 60° cos 80° =

Discussion

42.	total number of tetrahedral voids in unitcells of fcc and bcc are x and octahedral voids in fcc are y.then find the value(x-2y)?
Answer» total number of tetrahedral voids in unitcells of fcc and bcc are x and octahedral voids in fcc are y.then find the value(x-2y)?

Discussion

43.	Discuss the nature of bonding in the following coordinationentities on the basis of valence bond theory:(i) [Fe(CN)6]4− (ii) [FeF6]3− (iii) [Co(C2O4)3]3− (iv) [CoF6]3−
Answer» Discuss the nature of bonding in the following coordination entities on the basis of valence bond theory: (i) [Fe(CN)₆]⁴⁻ (ii) [FeF₆]³⁻ (iii) [Co(C₂O₄)3]³⁻ (iv) [CoF₆]³⁻

43.

Discuss the nature of bonding in the following coordinationentities on the basis of valence bond theory:(i) [Fe(CN)6]4− (ii) [FeF6]3− (iii) [Co(C2O4)3]3− (iv) [CoF6]3−

Answer»

Discuss the nature of bonding in the following coordination
entities on the basis of valence bond theory:

(i) [Fe(CN)₆]⁴⁻

(ii) [FeF₆]³⁻

(iii) [Co(C₂O₄)3]³⁻

(iv) [CoF₆]³⁻

Discussion

44.	50. Mention all the possible isomers of C3H6O2
Answer» 50. Mention all the possible isomers of C3H6O2

Discussion

45.	The correct thermodynamic conditions for the spontaneousreaction at all temperatures is :(a) ∆H
Answer» The correct thermodynamic conditions for the spontaneous reaction at all temperatures is : (a) ∆H<0 and ∆S < 0 (b) ∆H < 0 and ∆S <0 (c) ∆H <0 and ∆S = 0 (d) ∆H >0 and ∆S < 0 Reaction is spontaneous when ∆S is positive and ∆H is negative

Discussion

46.	select the pair of orbital which form pi bond by taking all given axis one by on 1.x as internuclear axis 2.y as internuclear axis 3.z as internuclear axis 1.Px+Py 2.Px+Px 3.dxy+Py 4.dxy+Px also explain why other options are incorrect
Answer» select the pair of orbital which form pi bond by taking all given axis one by on 1.x as internuclear axis 2.y as internuclear axis 3.z as internuclear axis 1.Px+Py 2.Px+Px 3.dxy+Py 4.dxy+Px also explain why other options are incorrect

Discussion

47.	Which one of the following has largest number of isomers?(R=alkyl group;en=ethylenediamine)
Answer» Which one of the following has largest number of isomers? (R=alkyl group;en=ethylenediamine)

Discussion

48.	Doesthe number of moles of reaction products increase, decrease or remainsame when each of the following equilibria is subjected to a decreasein pressure by increasing the volume?(a)(b)(c)
Answer» Does the number of moles of reaction products increase, decrease or remain same when each of the following equilibria is subjected to a decrease in pressure by increasing the volume? (a) (b) (c)

48.

Doesthe number of moles of reaction products increase, decrease or remainsame when each of the following equilibria is subjected to a decreasein pressure by increasing the volume?(a)(b)(c)

Answer»

Does
the number of moles of reaction products increase, decrease or remain
same when each of the following equilibria is subjected to a decrease
in pressure by increasing the volume?

(a)

(b)

(c)

Discussion

49.	What is the major drawback of Fruendlich isotherm?
Answer» What is the major drawback of Fruendlich isotherm?

Discussion

50.	In the presence of a small amount of water, PCl5 hydrolyses to form:
Answer» In the presence of a small amount of water, $P C l_{5}$ hydrolyses to form:

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The correct order of increasing bond angles in the following triatomic species is (a) NO2+

Glycerol reacts with P4 + I2 to form (a)aldehyde (b)allyl alcohol (c)allyl iodid (d)acetylene

List all allotropes of carbon.

Tranquilizers are substances used for the treatment of:

Match List-I with List-IIList-IList-II(a) NaOH(i) Acidic(b) Be(OH)2(ii)Basic(c)Ca(OH)2(iii) Amphoteric(d) B(OH)3 (e) Al(OH)3 Choose the most appropriate answer from the options given below :

A light vertical rod is given a slight jerk.locus of particles of the rod?

What happens when alcohols reacts with ethers

How to calculate bond enthalpy?

The colour of Cu(I) salts is

Find the longitudinal stress applied to a steel wire to stretch it by 0.025 % of its original length, if the ratio of longitudinal stress and strain is 9×1010 Nm−2.

Reaction of Br2 with Na2CO3 in aqueous solution gives sodium bromide and sodium bromate with evolution of CO2 gas. The number of sodium bromide molecules involved in the balanced chemical equation is ___

Acetate rayon is prepared from

The ionisation energy of hydrogen atom in its ground state is 13.6 eV. The energy released (in eV) for the third line of Balmer series is:

Which one of the following is most electropositive and why?a)Clb)Oc)Ald)BeWhy Al and not Be

Equal volumes of three acid solutions of pH-3,4 and 5 are mixed in a vessel. What will be the H+ ion concentration in the mixture?

nthalf life of radioactive decay of c14 is 5730 years .how much time it will take so that 25%of c14 was found in sample?n

Which of the following will give Cannizzaro’s reaction?

in arrhenius equation for a certain reaction ; the value of A and Ea are 4×10 raised to power 13 and 98.67 kJ / mol respectively .if the reaction is of first order ; then at what temp will its half period be 10 min ?

how to solve log 23

What is aromaticity and huckle rule ?

What is the oxidation state of F in Of2 and O2F2??

38.What will be the major product of cross aldol condensation of ethanal and propanal.

The correct statement regarding electrophile is

Hybridisation of silicon in silica is .

If wavelength max is 6563 A^° foe balmer series for a particular atom then wavelength pf second line for balmer series is?

find the pH of 0.5M HF(ka =2\ast10^{-4}) 4 2 3 2.

A certain amount of a metal whose equivalent massis 28 displaces 0.7 L of H2 at S.T.P. from an acid hence mass of the element is

LET A=[3 1 THEN SUM OF ALL THE ELEMENTS OF A^50 -16 -5]

The IUPAC name of the compound

calculate molality of an aqueous solution where moles of solute are 0.4

The solubility product of BaCrO4 is 2.4×10−10 M2. The maximum concentration of Ba(NO3)2 possible without precipitation in a 6×10−4 M K2CrO4 solution is

Select the most stable carbocation among the following

do Representative elements also include noble gases?

For the reaction, PCl5(g)⇌PCl3(g)+Cl2(g), the degree of dissociation 'x' is related to pressure 'P(x&lt;&lt;1)

4.5 g water is added into an oleum sample labelled as 109% H2SO4. What is the amount of free SO3 remaining in the solution?

Why axial bond pairs suffer more repulsive interaction from the equatorial bond pairs

Integral dx/(3x+5) = ?

Calculate the radius of the third orbit of a hydrogen atom; the radius of the first Bohr orbit of hydrogen atom is 0.53 Å.

Cos 20° cos 40° cos 60° cos 80° =

total number of tetrahedral voids in unitcells of fcc and bcc are x and octahedral voids in fcc are y.then find the value(x-2y)?

Discuss the nature of bonding in the following coordinationentities on the basis of valence bond theory:(i) [Fe(CN)6]4− (ii) [FeF6]3− (iii) [Co(C2O4)3]3− (iv) [CoF6]3−

50. Mention all the possible isomers of C3H6O2

The correct thermodynamic conditions for the spontaneousreaction at all temperatures is :(a) ∆H

select the pair of orbital which form pi bond by taking all given axis one by on 1.x as internuclear axis 2.y as internuclear axis 3.z as internuclear axis 1.Px+Py 2.Px+Px 3.dxy+Py 4.dxy+Px also explain why other options are incorrect

Which one of the following has largest number of isomers?(R=alkyl group;en=ethylenediamine)

Doesthe number of moles of reaction products increase, decrease or remainsame when each of the following equilibria is subjected to a decreasein pressure by increasing the volume?(a)(b)(c)

What is the major drawback of Fruendlich isotherm?

In the presence of a small amount of water, PCl5 hydrolyses to form:

For the reaction, PCl5(g)⇌PCl3(g)+Cl2(g), the degree of dissociation 'x' is related to pressure 'P(x<<1)