46295 + Interview Questions in Chemistry

1.	Equal volumes of 0.002 M solutions of sodium iodate and cupric chlorate are mixed together. Will it lead to precipitation of copper iodate? (For cupric iodate Ksp = 7.4×10−8).
Answer» Equal volumes of 0.002 M solutions of sodium iodate and cupric chlorate are mixed together. Will it lead to precipitation of copper iodate? (For cupric iodate Ksp = $7.4 \times 10^{- 8}$ ).

Discussion

2.	The major products obtained in the reaction of oxalic acid with conc. H2SO4 upon heating are:
Answer» The major products obtained in the reaction of oxalic acid with conc. $H_{2} S O_{4}$ upon heating are:

Discussion

3.	Which is the major product expected from the following SN2 reaction
Answer» Which is the major product expected from the following $S N^{2}$ reaction

Discussion

4.	QUESTION 2.3 (I) Define the following term: (i) Mole fraction (ii) Molality (iii) Molarity (iv) Mass percentage
Answer» QUESTION 2.3 (I) Define the following term: (i) Mole fraction (ii) Molality (iii) Molarity (iv) Mass percentage

4.

QUESTION 2.3 (I) Define the following term: (i) Mole fraction (ii) Molality (iii) Molarity (iv) Mass percentage

Answer»

QUESTION 2.3 (I)

Define the following term:

(i) Mole fraction

(ii) Molality

(iii) Molarity

(iv) Mass percentage

Discussion

5.	Which of the following moleculaes has two sigma (σ) and two pi (π) bonds?
Answer» Which of the following moleculaes has two sigma $(σ)$ and two pi $(π)$ bonds?

Discussion

6.	Which of the following are carbon compounds obtained from inorganic materials?
Answer» Which of the following are carbon compounds obtained from inorganic materials?

Discussion

7.	Which of the following is acyclic?
Answer» Which of the following is acyclic?

Discussion

8.	An aqueous solution of methanol in water has vapour pressure:
Answer» An aqueous solution of methanol in water has vapour pressure:

8.

An aqueous solution of methanol in water has vapour pressure:

Answer»

An aqueous solution of methanol in water has vapour pressure:

Discussion

9.	When benzoic acid dissolve in benzene, the observed molecular mass is:
Answer» When benzoic acid dissolve in benzene, the observed molecular mass is:

Discussion

10.	A tiny positively charged particle is moving head-on towards a heavy nucleus .The distance of closest approach depends upon
Answer» A tiny positively charged particle is moving head-on towards a heavy nucleus .The distance of closest approach depends upon

Discussion

11.	For the reaction 2NO+Br2→2NOBrthe following mechanism has been given: NO+Br2⇌NOBr2 NOBr2+NO→2NOBr (slow) Hence, the rate law is :
Answer» For the reaction $2 NO + {Br}_{2} \to 2 NOBr$ the following mechanism has been given: $NO + {Br}_{2} ⇌ {NOBr}_{2}$ ${NOBr}_{2} + NO \to 2 NOBr (slow)$ Hence, the rate law is :

Discussion

12.	Consider the reaction . The standard reduction potential values of the elements and respectively. The order of their reducing power will be [NCERT 1990]
Answer» Consider the reaction . The standard reduction potential values of the elements and respectively. The order of their reducing power will be [NCERT 1990]

12.

Consider the reaction . The standard reduction potential values of the elements and respectively. The order of their reducing power will be [NCERT 1990]

Answer»

Consider the reaction . The standard reduction potential values of the elements and respectively. The order of their reducing power will be

[NCERT 1990]

Discussion

13.	Which of the following compound statement is/are incorrect?
Answer» Which of the following compound statement is/are incorrect?

Discussion

14.	The dipole moment of H-Br molecule is 2.6×10^-30. It's bond length is 1.3A°. Then the percentage ionic character of H-Br ?
Answer» The dipole moment of H-Br molecule is 2.6×10^-30. It's bond length is 1.3A°. Then the percentage ionic character of H-Br ?

Discussion

15.	Among the following the weakest one is
Answer» Among the following the weakest one is

15.

Among the following the weakest one is

Answer»

Among the following the weakest one is

Discussion

16.	The reaction in which △H>△U is
Answer» The reaction in which $△ H > △ U$ is

Discussion

17.	Of the following reactions (i) A ⇌ B ΔD G0 = 250 kJ mol−1 (ii) D ⇌ E Δ D G0 = -100 kJ mol−1 (iii) F ⇌ G Δ D G0 = -150 kJ mol−1 (iv) M ⇌ N Δ D G0 = 150 kJ mol−1 the reaction with the largest equilibrium constant is
Answer» Of the following reactions (i) A $⇌$ B $Δ$ D G $^{0}$ = 250 kJ mol $^{- 1}$ (ii) D $⇌$ E $Δ$ D G $^{0}$ = -100 kJ mol $^{- 1}$ (iii) F $⇌$ G $Δ$ D G $^{0}$ = -150 kJ mol $^{- 1}$ (iv) M $⇌$ N $Δ$ D G $^{0}$ = 150 kJ mol $^{- 1}$ the reaction with the largest equilibrium constant is

17.

Of the following reactions (i) A ⇌ B ΔD G0 = 250 kJ mol−1 (ii) D ⇌ E Δ D G0 = -100 kJ mol−1 (iii) F ⇌ G Δ D G0 = -150 kJ mol−1 (iv) M ⇌ N Δ D G0 = 150 kJ mol−1 the reaction with the largest equilibrium constant is

Answer»

Of the following reactions

(i) A $⇌$ B $Δ$ D G $^{0}$ = 250 kJ mol $^{- 1}$

(ii) D $⇌$ E $Δ$ D G $^{0}$ = -100 kJ mol $^{- 1}$

(iii) F $⇌$ G $Δ$ D G $^{0}$ = -150 kJ mol $^{- 1}$

(iv) M $⇌$ N $Δ$ D G $^{0}$ = 150 kJ mol $^{- 1}$

the reaction with the largest equilibrium constant is

Discussion

18.	The first ionization enthalpies for three elements are 1314, 1680, and 2080 kJ mol−1, respectively. The correct sequence of the elements is
Answer» The first ionization enthalpies for three elements are 1314, 1680, and 2080 kJ mol $^{- 1}$ , respectively. The correct sequence of the elements is

Discussion

19.	The correct decreasing order of acidic strength is:
Answer» The correct decreasing order of acidic strength is:

Discussion

20.	Which one in the following is not the resonance structure of CO2
Answer» Which one in the following is not the resonance structure of $C O_{2}$

Discussion

21.	HCl is added to following oxides. Which one would give H2O2?
Answer» HCl is added to following oxides. Which one would give $H_{2} O_{2}$ ?

21.

HCl is added to following oxides. Which one would give H2O2?

Answer»

HCl is added to following oxides. Which one would give $H_{2} O_{2}$ ?

Discussion

22.	Bond dissociation energy of CH3−H bond is 103 kcal mol−1 and heat of formation of CH4(g) as −17.88 kcal mol−1. The dissociation energy of H2(g) into H atoms is 103 kcal/mol. The heat of formation of methyl radical is ?
Answer» Bond dissociation energy of $C H_{3} - H$ bond is $103 k c a l m o l^{- 1}$ and heat of formation of $C H_{4} (g)$ as $- 17.88 k c a l m o l^{- 1} .$ The dissociation energy of $H_{2} (g)$ into $H$ atoms is $103 k c a l / m o l .$ The heat of formation of methyl radical is ?

Discussion

23.	What is the heat of solution of sodium chloride if hydration energy of Na+ is −389.4 kJ mol−1, hydration energy of Cl− is −382.3 kJ mol−1 and lattice energy of NaCl=+776 kJ mol−1?
Answer» What is the heat of solution of sodium chloride if hydration energy of $N a^{+}$ is $- 389.4 {kJ mol}^{- 1}$ , hydration energy of $C l^{-}$ is $- 382.3 {kJ mol}^{- 1}$ and lattice energy of $N a C l = + 776 {kJ mol}^{- 1}$ ?

Discussion

24.	What is the change in hybridization of oxygen atom associated with carbon in the zone of reduction?
Answer» What is the change in hybridization of oxygen atom associated with carbon in the zone of reduction?

Discussion

25.	The statement that is not correct for periodic classification of elements is (a) The properties of elements are the periodic function of their atomic numbers (b) Non-metallic elements are less in numbers than metallic elements (c) For transition elements, the 3d orbitals are filled with electrons after 3 p - orbitals and before 4s orbitals (d) the first ionization enthalpies of elements generally increase with the increase in atomic number as we go along a period
Answer» The statement that is not correct for periodic classification of elements is (a) The properties of elements are the periodic function of their atomic numbers (b) Non-metallic elements are less in numbers than metallic elements (c) For transition elements, the 3d orbitals are filled with electrons after 3 p - orbitals and before 4s orbitals (d) the first ionization enthalpies of elements generally increase with the increase in atomic number as we go along a period

Discussion

26.	70 lakhs cars get added on the roads of metropolitans every year. Is it justified? What policy measures can you suggest?
Answer» 70 lakhs cars get added on the roads of metropolitans every year. Is it justified? What policy measures can you suggest?

Discussion

27.	Which of the following statement is true about interhalogen compounds?
Answer» Which of the following statement is true about interhalogen compounds?

Discussion

28.	The e.m.f. of the following cell containing two hydrogen electrodes is Pt,12H2(g)\|H+(10−8M)\|\| M+(0.001M)\|12H2(g)Pt
Answer» The e.m.f. of the following cell containing two hydrogen electrodes is $P t, \frac{1}{2} H_{2} (g) \| H^{+} (10^{- 8} M) \| \| M^{+} (0.001 M) \| \frac{1}{2} H_{2} (g) P t$

Discussion

29.	[DCE 2002; MHCET 2004]
Answer» [DCE 2002; MHCET 2004]

29.

[DCE 2002; MHCET 2004]

Answer»

[DCE 2002; MHCET 2004]

Discussion

30.	Experimentally it was found that a metal oxide has a formula of M0.98 o . Metal M is present as M*+2 and M+3 in its oxide . Fraction of metal which exists as M3+ would be? Kindly give explanation for the steps because I have already gone through the solution but not able to follow it..
Answer» Experimentally it was found that a metal oxide has a formula of M0.98 o . Metal M is present as M*+2 and M+3 in its oxide . Fraction of metal which exists as M3+ would be? Kindly give explanation for the steps because I have already gone through the solution but not able to follow it..

30.

Experimentally it was found that a metal oxide has a formula of M0.98 o . Metal M is present as M*+2 and M+3 in its oxide . Fraction of metal which exists as M3+ would be? Kindly give explanation for the steps because I have already gone through the solution but not able to follow it..

Answer»

Experimentally it was found that a metal oxide has a formula of M0.98 o . Metal M is present as M*+2 and M+3 in its oxide . Fraction of metal which exists as M3+ would be?

Kindly give explanation for the steps because I have already gone through the solution but not able to follow it..

Discussion

31.	Namet two α\alphaα-amino acids which form a dipeptide which is 100 times more sweet than cane sugar ?
Answer» Namet two $α\alpha$ -amino acids which form a dipeptide which is 100 times more sweet than cane sugar ?

Discussion

32.	Arrange benzene, n-hexane and ethyne in decreasing order of acidic behaviour. Also give reason for this behaviour.
Answer» Arrange benzene, n-hexane and ethyne in decreasing order of acidic behaviour. Also give reason for this behaviour.

Discussion

33.	A mixture of three amines A, B and C is treated with Benzene sulphonyl chloride and filtered.' B' is obtained in the filterate. The mixture containing A and C is treated with KOH so that' A' becomes soluble while 'C' does not. Now A, B and C are
Answer» A mixture of three amines A, B and C is treated with Benzene sulphonyl chloride and filtered.' B' is obtained in the filterate. The mixture containing A and C is treated with KOH so that' A' becomes soluble while 'C' does not. Now A, B and C are

Discussion

34.	Stability decreases in the order
Answer» Stability decreases in the order

Discussion

35.	Which one of the following salts would have the same value of the Vant Hoff factor (i) as that of :
Answer» Which one of the following salts would have the same value of the Vant Hoff factor (i) as that of :

Discussion

36.	Their cyclic structures of monosaccharides are given below which of these are anomers. (a) I and II (b) II and III (c) I and III (d) III is anomer of I and II
Answer» Their cyclic structures of monosaccharides are given below which of these are anomers. (a) I and II (b) II and III (c) I and III (d) III is anomer of I and II

Discussion

37.	Give plausible explanation for each of the following: Why do primary amines have higher boiling point that tertiary amines?
Answer» Give plausible explanation for each of the following: Why do primary amines have higher boiling point that tertiary amines?

37.

Give plausible explanation for each of the following: Why do primary amines have higher boiling point that tertiary amines?

Answer»

Give plausible explanation for each of the following:

Why do primary amines have higher boiling point that tertiary amines?

Discussion

38.	BeF2 is more soluble in water, where as the fluoride of other alkaline earth metals are insoluble because of
Answer» BeF₂ is more soluble in water, where as the fluoride of other alkaline earth metals are insoluble because of

Discussion

39.	Which of the following are purine bases? (a) Guanine (b) Adenine (c) Thymine (d) Uracil
Answer» Which of the following are purine bases? (a) Guanine (b) Adenine (c) Thymine (d) Uracil

Discussion

40.	The total number of cyclic isomers possible for a hydrocarbon with the molecular formula C4H6 is___
Answer» The total number of cyclic isomers possible for a hydrocarbon with the molecular formula $C_{4} H_{6}$ is___

Discussion

41.	Which of the following is the correct decreasing order of boiling points?
Answer» Which of the following is the correct decreasing order of boiling points?

Discussion

42.	Which among the following mixture form an ideal solution?
Answer» Which among the following mixture form an ideal solution?

Discussion

43.	A metal (X) dissolves both in dilute HCl and dilute NaOH to liberate H2. Addition of NH4Cl and excess NH4OH to an HCl solution of X produce Y as a precipitate. Y is also produced by adding NH4Cl to the NaOH solution of X. The species X and Y, respectively, are
Answer» A metal (X) dissolves both in dilute HCl and dilute NaOH to liberate $H_{2}$ . Addition of $N H_{4} C l$ and excess $N H_{4} O H$ to an HCl solution of X produce Y as a precipitate. Y is also produced by adding $N H_{4} C l$ to the NaOH solution of X. The species X and Y, respectively, are

Discussion

44.	The salt which responds to dilute and concentrated H2SO4 is
Answer» The salt which responds to dilute and concentrated $H_{2} S O_{4}$ is

Discussion

45.	The following acids have been arranged in order of increasing acid strength. Identify the correct order. ClOH (I) BrOH (II) IOH (III)
Answer» The following acids have been arranged in order of increasing acid strength. Identify the correct order. ClOH (I) BrOH (II) IOH (III)

Discussion

46.	Which are true statements among the following ? (A)PH5 andBiCl5 do not exist (B) Bond order of CO−32 is 1.33 (C)SeF4 and CH4 have same shape (D)I−3 has linear geometry (E) The number of Pπ-dπ bonds in SO2andSO3 are same
Answer» Which are true statements among the following ? (A) $P H_{5}$ and $B i C l_{5}$ do not exist (B) Bond order of $C O_{3}^{-} 2$ is 1.33 (C) $S e F_{4}$ and $C H_{4}$ have same shape (D) $I_{3}^{-}$ has linear geometry (E) The number of $P_{π}$ - $d_{π}$ bonds in $S O_{2}$ and $S O_{3}$ are same

46.

Which are true statements among the following ? (A)PH5 andBiCl5 do not exist (B) Bond order of CO−32 is 1.33 (C)SeF4 and CH4 have same shape (D)I−3 has linear geometry (E) The number of Pπ-dπ bonds in SO2andSO3 are same

Answer»

Which are true statements among the following ?

(A) $P H_{5}$ and $B i C l_{5}$ do not exist

(B) Bond order of $C O_{3}^{-} 2$ is 1.33

(C) $S e F_{4}$ and $C H_{4}$ have same shape

(D) $I_{3}^{-}$ has linear geometry

(E) The number of $P_{π}$ - $d_{π}$ bonds in $S O_{2}$ and $S O_{3}$ are same

Discussion

47.	The ratio of mass percent of C and H in an organic compound (CxHyOz) is 6 : 1. If one molecule of the above compound (CxHyOz) contains half as much oxygen as it is required to burn one molecule of a compound CxHy completely to CO2 and H2O, then the empirical formula of compound CxHyOz is:
Answer» The ratio of mass percent of C and H in an organic compound $(C_{x} H_{y} O_{z})$ is 6 : 1. If one molecule of the above compound $(C_{x} H_{y} O_{z})$ contains half as much oxygen as it is required to burn one molecule of a compound $C_{x} H_{y}$ completely to $C O_{2}$ and $H_{2} O$ , then the empirical formula of compound $C_{x} H_{y} O_{z}$ is:

Discussion

48.	A first order reaction is 50% completed in 1.26×1014 s. How much time would it take for 100% completion?
Answer» A first order reaction is 50% completed in $1.26 \times 10^{14}$ s. How much time would it take for 100% completion?

48.

A first order reaction is 50% completed in 1.26×1014 s. How much time would it take for 100% completion?

Answer»

A first order reaction is 50% completed in $1.26 \times 10^{14}$ s. How much time would it take for 100% completion?

Discussion

49.	Which one shows maximum hydrogen bonding?
Answer» Which one shows maximum hydrogen bonding?

Discussion

50.	How do you explain the amphoteric behaviour of amino acids?
Answer» How do you explain the amphoteric behaviour of amino acids?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Equal volumes of 0.002 M solutions of sodium iodate and cupric chlorate are mixed together. Will it lead to precipitation of copper iodate? (For cupric iodate Ksp = 7.4×10−8).

The major products obtained in the reaction of oxalic acid with conc. H2SO4 upon heating are:

Which is the major product expected from the following SN2 reaction

QUESTION 2.3 (I) Define the following term: (i) Mole fraction (ii) Molality (iii) Molarity (iv) Mass percentage

Which of the following moleculaes has two sigma (σ) and two pi (π) bonds?

Which of the following are carbon compounds obtained from inorganic materials?

Which of the following is acyclic?

An aqueous solution of methanol in water has vapour pressure:

When benzoic acid dissolve in benzene, the observed molecular mass is:

A tiny positively charged particle is moving head-on towards a heavy nucleus .The distance of closest approach depends upon

For the reaction 2NO+Br2→2NOBrthe following mechanism has been given: NO+Br2⇌NOBr2 NOBr2+NO→2NOBr (slow) Hence, the rate law is :

Consider the reaction . The standard reduction potential values of the elements and respectively. The order of their reducing power will be [NCERT 1990]

Which of the following compound statement is/are incorrect?

The dipole moment of H-Br molecule is 2.6×10^-30. It's bond length is 1.3A°. Then the percentage ionic character of H-Br ?

Among the following the weakest one is

The reaction in which △H&gt;△U is

Of the following reactions (i) A ⇌ B ΔD G0 = 250 kJ mol−1 (ii) D ⇌ E Δ D G0 = -100 kJ mol−1 (iii) F ⇌ G Δ D G0 = -150 kJ mol−1 (iv) M ⇌ N Δ D G0 = 150 kJ mol−1 the reaction with the largest equilibrium constant is

The first ionization enthalpies for three elements are 1314, 1680, and 2080 kJ mol−1, respectively. The correct sequence of the elements is

The correct decreasing order of acidic strength is:

Which one in the following is not the resonance structure of CO2

HCl is added to following oxides. Which one would give H2O2?

Bond dissociation energy of CH3−H bond is 103 kcal mol−1 and heat of formation of CH4(g) as −17.88 kcal mol−1. The dissociation energy of H2(g) into H atoms is 103 kcal/mol. The heat of formation of methyl radical is ?

What is the heat of solution of sodium chloride if hydration energy of Na+ is −389.4 kJ mol−1, hydration energy of Cl− is −382.3 kJ mol−1 and lattice energy of NaCl=+776 kJ mol−1?

What is the change in hybridization of oxygen atom associated with carbon in the zone of reduction?

70 lakhs cars get added on the roads of metropolitans every year. Is it justified? What policy measures can you suggest?

Which of the following statement is true about interhalogen compounds?

The e.m.f. of the following cell containing two hydrogen electrodes is Pt,12H2(g)|H+(10−8M)|| M+(0.001M)|12H2(g)Pt

[DCE 2002; MHCET 2004]

Experimentally it was found that a metal oxide has a formula of M0.98 o . Metal M is present as M*+2 and M+3 in its oxide . Fraction of metal which exists as M3+ would be? Kindly give explanation for the steps because I have already gone through the solution but not able to follow it..

Namet two α\alphaα-amino acids which form a dipeptide which is 100 times more sweet than cane sugar ?

Arrange benzene, n-hexane and ethyne in decreasing order of acidic behaviour. Also give reason for this behaviour.

A mixture of three amines A, B and C is treated with Benzene sulphonyl chloride and filtered.' B' is obtained in the filterate. The mixture containing A and C is treated with KOH so that' A' becomes soluble while 'C' does not. Now A, B and C are

Stability decreases in the order

Which one of the following salts would have the same value of the Vant Hoff factor (i) as that of :

Their cyclic structures of monosaccharides are given below which of these are anomers. (a) I and II (b) II and III (c) I and III (d) III is anomer of I and II

Give plausible explanation for each of the following: Why do primary amines have higher boiling point that tertiary amines?

BeF2 is more soluble in water, where as the fluoride of other alkaline earth metals are insoluble because of

Which of the following are purine bases? (a) Guanine (b) Adenine (c) Thymine (d) Uracil

The total number of cyclic isomers possible for a hydrocarbon with the molecular formula C4H6 is___

Which of the following is the correct decreasing order of boiling points?

Which among the following mixture form an ideal solution?

A metal (X) dissolves both in dilute HCl and dilute NaOH to liberate H2. Addition of NH4Cl and excess NH4OH to an HCl solution of X produce Y as a precipitate. Y is also produced by adding NH4Cl to the NaOH solution of X. The species X and Y, respectively, are

The salt which responds to dilute and concentrated H2SO4 is

The following acids have been arranged in order of increasing acid strength. Identify the correct order. ClOH (I) BrOH (II) IOH (III)

Which are true statements among the following ? (A)PH5 andBiCl5 do not exist (B) Bond order of CO−32 is 1.33 (C)SeF4 and CH4 have same shape (D)I−3 has linear geometry (E) The number of Pπ-dπ bonds in SO2andSO3 are same

The ratio of mass percent of C and H in an organic compound (CxHyOz) is 6 : 1. If one molecule of the above compound (CxHyOz) contains half as much oxygen as it is required to burn one molecule of a compound CxHy completely to CO2 and H2O, then the empirical formula of compound CxHyOz is:

A first order reaction is 50% completed in 1.26×1014 s. How much time would it take for 100% completion?

Which one shows maximum hydrogen bonding?

How do you explain the amphoteric behaviour of amino acids?

The reaction in which △H>△U is