46295 + Interview Questions in Chemistry

1.	Why does Mn in oxide exhibit higher oxidation state than fluoride?
Answer» Why does Mn in oxide exhibit higher oxidation state than fluoride?

Discussion

2.	How many molecules are synthesized by 1 molecule of acetyl Co-A and how?
Answer» How many molecules are synthesized by 1 molecule of acetyl Co-A and how?

Discussion

3.	The physical constant, ___________ is less for D2O as compared to that of H2O.
Answer» The physical constant, ___________ is less for $D_{2}$ O as compared to that of $H_{2}$ O.

Discussion

4.	The shape of covalent molecule MX3 is
Answer» The shape of covalent molecule $M X_{3}$ is

Discussion

5.	Isopropyl alcohol on oxidation forms:
Answer» Isopropyl alcohol on oxidation forms:

Discussion

6.	The internal energy of a given mass of gas in a system depends upon
Answer» The internal energy of a given mass of gas in a system depends upon

Discussion

7.	The compressibility factor for a van der Waal’s gas at the critical point is:
Answer» The compressibility factor for a van der Waal’s gas at the critical point is:

Discussion

8.	Which of the following dipolar structure of the amino acid is considered to be more correct ?
Answer» Which of the following dipolar structure of the amino acid is considered to be more correct ?

Discussion

9.	The decomposition of phosphine (PH3)on tungsten at low pressure is a first-order reaction. It is because the:
Answer» The decomposition of phosphine (PH₃)on tungsten at low pressure is a first-order reaction. It is because the:

Discussion

10.	Schottky defect generally appears in[DCE 2004]
Answer» Schottky defect generally appears in [DCE 2004]

10.

Schottky defect generally appears in[DCE 2004]

Answer»

Schottky defect generally appears in

[DCE 2004]

Discussion

11.	The compound that will behave as an acid in H2SO4 is:
Answer» The compound that will behave as an acid in $H_{2} S O_{4}$ is:

Discussion

12.	For the reaction Cl2+2I–→I2+2Cl–, the initial concentration of I– was 0.2 mol L–1 and the concentration after 20 min was 0.18 mol L–1. The rate of formation of l2 in mol L–1 min–1 would be
Answer» For the reaction $C l_{2} + 2 I^{-} \to I_{2} + 2 C l^{-}$ , the initial concentration of $I^{-}$ was 0.2 mol $L^{- 1}$ and the concentration after 20 min was 0.18 mol $L^{- 1}$ . The rate of formation of l2 in mol $L^{- 1} m i n^{- 1}$ would be

Discussion

13.	In the reaction S+32O2→SO3+2xkJ and SO2+12O2→SO3+ykJ Heat of formation of SO2 is
Answer» In the reaction $S + \frac{3}{2} O_{2} \to S O_{3} + 2 x k J$ and $S O_{2} + \frac{1}{2} O_{2} \to S O_{3} + y k J$ Heat of formation of $S O_{2}$ is

13.

In the reaction S+32O2→SO3+2xkJ and SO2+12O2→SO3+ykJ Heat of formation of SO2 is

Answer»

In the reaction

$S + \frac{3}{2} O_{2} \to S O_{3} + 2 x k J$ and $S O_{2} + \frac{1}{2} O_{2} \to S O_{3} + y k J$

Heat of formation of $S O_{2}$ is

Discussion

14.	On acetylation of A, the product obtained is:
Answer» On acetylation of A, the product obtained is:

Discussion

15.	When mercury is heated with aqua regia then which compound is formed?
Answer» When mercury is heated with aqua regia then which compound is formed?

Discussion

16.	Which of the following is an example of rearrangement reaction?
Answer» Which of the following is an example of rearrangement reaction?

Discussion

17.	Which of the following compound is expected to be most basic [NCERT 1982]
Answer» Which of the following compound is expected to be most basic [NCERT 1982]

17.

Which of the following compound is expected to be most basic [NCERT 1982]

Answer»

Which of the following compound is expected to be most basic

[NCERT 1982]

Discussion

18.	1000 g impure sample of NaOH contains 3 mol of oxygen atoms. The % purity of the sample is:
Answer» 1000 g impure sample of NaOH contains 3 mol of oxygen atoms. The $%$ purity of the sample is:

Discussion

19.	Assertion and Reason In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice.. (a) Assertion and reason both are correct statements but reason does not explain assertion. (b) Assertion and reason both are correct and reason explains asssWon. (c) Both assertion and reason are Wrong statements. (d) Assertion is correct statement reason is wrong statement. (e) Assertion is wrong statement reason is correct statement. Assertion (A) Penicillin (G) is an antihistamine. Reason (R) Penicillin (G) is effective against gram positive as well as gram negative bacteria.
Answer» Assertion and Reason In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice.. (a) Assertion and reason both are correct statements but reason does not explain assertion. (b) Assertion and reason both are correct and reason explains asssWon. (c) Both assertion and reason are Wrong statements. (d) Assertion is correct statement reason is wrong statement. (e) Assertion is wrong statement reason is correct statement. Assertion (A) Penicillin (G) is an antihistamine. Reason (R) Penicillin (G) is effective against gram positive as well as gram negative bacteria.

19.

Assertion and Reason In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice.. (a) Assertion and reason both are correct statements but reason does not explain assertion. (b) Assertion and reason both are correct and reason explains asssWon. (c) Both assertion and reason are Wrong statements. (d) Assertion is correct statement reason is wrong statement. (e) Assertion is wrong statement reason is correct statement. Assertion (A) Penicillin (G) is an antihistamine. Reason (R) Penicillin (G) is effective against gram positive as well as gram negative bacteria.

Answer»

Assertion and Reason
In the following questions a statement of assertion (A) followed by a statement reason (R) is given. Choose the correct answer out of the following choice..
(a) Assertion and reason both are correct statements but reason does not explain assertion.
(b) Assertion and reason both are correct and reason explains asssWon.
(c) Both assertion and reason are Wrong statements.
(d) Assertion is correct statement reason is wrong statement.
(e) Assertion is wrong statement reason is correct statement.

Assertion (A) Penicillin (G) is an antihistamine.
Reason (R) Penicillin (G) is effective against gram positive as well as gram negative bacteria.

Discussion

20.	Which of the following reaction(s) will give an ester as the final product?
Answer» Which of the following reaction(s) will give an ester as the final product?

Discussion

21.	(a) Following are the transition metal ions of 3d series: Ti4+,V2+,Mn3+,Cr3+ (Atomic numbers : Ti = 22, V = 23, Mn = 25, Cr = 24) Answer the following: (i) Which ion is most stable in an aqueous solution and why? (ii) Which ion is a strong oxidising agent and why? (iii) Which ion is colourless and why? (b) Complete the following equations: (i) 2MnO−4+16H++5S2−→(ii) KMnO4Heat−−−→
Answer» (a) Following are the transition metal ions of 3d series: $T i^{4 +}, V^{2 +}, M n^{3 +}, C r^{3 +}$ (Atomic numbers : Ti = 22, V = 23, Mn = 25, Cr = 24) Answer the following: (i) Which ion is most stable in an aqueous solution and why? (ii) Which ion is a strong oxidising agent and why? (iii) Which ion is colourless and why? (b) Complete the following equations: $(i) 2 M n O_{4}^{-} + 16 H^{+} + 5 S^{2 -} \to (i i) K M n O_{4} H e a t - -- \to$

Discussion

22.	A sample of a pure compound has 1.15 gm of sodium, 3.01×1022 atoms of carbon and 0.1 mol of oxygen atoms. Its empirical formula is:
Answer» A sample of a pure compound has 1.15 gm of sodium, $3.01 \times 10^{22}$ atoms of carbon and 0.1 mol of oxygen atoms. Its empirical formula is:

Discussion

23.	Which of the following ketones has the largest equilibrium constant for addition of water?
Answer» Which of the following ketones has the largest equilibrium constant for addition of water?

Discussion

24.	Q. Smallest among these species is: Options: A. Lithium ion B. Hydrogen C. Lithium D. Helium
Answer» Q. Smallest among these species is: Options: A. Lithium ion B. Hydrogen C. Lithium D. Helium

24.

Q. Smallest among these species is: Options: A. Lithium ion B. Hydrogen C. Lithium D. Helium

Answer»

Q. Smallest among these species is:

Options:

A. Lithium ion

B. Hydrogen

C. Lithium

D. Helium

Discussion

25.	A 821 mL N2 (g) was collected over liquid water at 300 K and 1 atm. If the vapour pressure of H2O is 30 torr then number of moles of N2 (g) in the moist gas mixture is:
Answer» A $821 mL N_{2} (g)$ was collected over liquid water at $300 K$ and 1 atm. If the vapour pressure of $H_{2} O$ is 30 torr then number of moles of $N_{2} (g)$ in the moist gas mixture is:

Discussion

26.	The order of covalent bond character for LiCl,BeCl2,BCl3 and CCl4 is:
Answer» The order of covalent bond character for $L i C l, B e C l_{2}, B C l_{3}$ and $C C l_{4}$ is:

Discussion

27.	Which of the following is not a state function
Answer» Which of the following is not a state function

Discussion

28.	The state of a mole of an ideal gas changed from state A(2p,v) through four different processes and finally return to initial state A reversibly as shown below. Calculate the total work done by the system and heat absorbed by the system in the cyclic process respectively.
Answer» The state of a mole of an ideal gas changed from state A( $2 p, v$ ) through four different processes and finally return to initial state A reversibly as shown below. Calculate the total work done by the system and heat absorbed by the system in the cyclic process respectively.

Discussion

29.	Why Fe2+ radialy oxidises to Fe3+??
Answer» Why Fe²⁺radialy oxidises to Fe³⁺??

Discussion

30.	On catalytic hydrogenation ethylene gives ethane. During this reaction hybridization of carbon atoms changes from SP2 to SP3 bond angle decreases from 120 to 109.5 C-C Bond length increases from 1.34 A° to 1.54 A° all of these
Answer» On catalytic hydrogenation ethylene gives ethane. During this reaction hybridization of carbon atoms changes from SP² to SP³ bond angle decreases from 120 to 109.5 C-C Bond length increases from 1.34 A° to 1.54 A° all of these

30.

On catalytic hydrogenation ethylene gives ethane. During this reaction hybridization of carbon atoms changes from SP2 to SP3 bond angle decreases from 120 to 109.5 C-C Bond length increases from 1.34 A° to 1.54 A° all of these

Answer»

On catalytic hydrogenation ethylene gives ethane. During this reaction

hybridization of carbon atoms changes from SP² to SP³

bond angle decreases from 120 to 109.5

C-C Bond length increases from 1.34 A° to 1.54 A°

all of these

Discussion

31.	Calculate the molarity of the solution obtained on mixing 100 mL of 0.1 M H2SO4 with 50 mL of 0.1 M NaOH.
Answer» Calculate the molarity of the solution obtained on mixing 100 mL of 0.1 M H2SO4 with 50 mL of 0.1 M NaOH.

Discussion

32.	Which of the following is the correct order for heat of hydrogenation of these compounds?
Answer» Which of the following is the correct order for heat of hydrogenation of these compounds?

Discussion

33.	Specify the coordination geometry around and hybridization of N and B atoms in a 1:1 complex of BF3 and NH3
Answer» Specify the coordination geometry around and hybridization of N and B atoms in a 1:1 complex of $B F_{3}$ and $N H_{3}$

Discussion

34.	Group 14 elements has the following electronic configuration:
Answer» Group 14 elements has the following electronic configuration:

Discussion

35.	By how much will the potential of half cell cu+2/Cu change, if the solution is diluted to 100 times at 298 K? (1) Increases by 59 mV (2) Decreases by 59 mV (3) Increases by 29.5 mv (4) Decreases by 29.5 mV
Answer» By how much will the potential of half cell cu+2/Cu change, if the solution is diluted to 100 times at 298 K? (1) Increases by 59 mV (2) Decreases by 59 mV (3) Increases by 29.5 mv (4) Decreases by 29.5 mV

35.

By how much will the potential of half cell cu+2/Cu change, if the solution is diluted to 100 times at 298 K? (1) Increases by 59 mV (2) Decreases by 59 mV (3) Increases by 29.5 mv (4) Decreases by 29.5 mV

Answer»

By how much will the potential of half cell cu+2/Cu change, if the solution is diluted to 100 times at 298 K?

(1) Increases by 59 mV

(2) Decreases by 59 mV

(3) Increases by 29.5 mv

(4) Decreases by 29.5 mV

Discussion

36.	What is penetration effect?
Answer» What is penetration effect?

Discussion

37.	In bohr series of lines of hydrogen spectrum the third line from the red end corresponds to which inter Orbit jumps of the electron for bohr Orbit in an atom of Hydrogen
Answer» In bohr series of lines of hydrogen spectrum the third line from the red end corresponds to which inter Orbit jumps of the electron for bohr Orbit in an atom of Hydrogen

Discussion

38.	The following equilibria are given: N2 +3H2 ⇋ 2NH3 K1 ; N2 + O2 ⇋ 2NO K2 ; H2 + 12 O2 ⇋ H2OK3 ; The Equilibrium constant for the reaction 2NH3 + 52 O2 ⇋ 2NO + 3H2 O in terms of K1K2 and K3 is:
Answer» The following equilibria are given: $N_{2}$ +3 $H_{2}$ $⇋$ $2 N H_{3}$ $K_{1}$ ; $N_{2}$ + $O_{2}$ $⇋$ 2NO $K_{2}$ ; $H_{2}$ + $\frac{1}{2}$ $O_{2}$ $⇋$ $H_{2} O K_{3}$ ; The Equilibrium constant for the reaction $2 N H_{3}$ + $\frac{5}{2}$ $O_{2}$ $⇋$ 2NO + 3 $H_{2}$ O in terms of $K_{1} K_{2}$ and $K_{3}$ is:

38.

The following equilibria are given: N2 +3H2 ⇋ 2NH3 K1 ; N2 + O2 ⇋ 2NO K2 ; H2 + 12 O2 ⇋ H2OK3 ; The Equilibrium constant for the reaction 2NH3 + 52 O2 ⇋ 2NO + 3H2 O in terms of K1K2 and K3 is:

Answer»

The following equilibria are given: $N_{2}$ +3 $H_{2}$ $⇋$ $2 N H_{3}$ $K_{1}$ ; $N_{2}$ + $O_{2}$ $⇋$ 2NO $K_{2}$ ;
$H_{2}$ + $\frac{1}{2}$ $O_{2}$ $⇋$ $H_{2} O K_{3}$ ;

The Equilibrium constant for the reaction $2 N H_{3}$ + $\frac{5}{2}$ $O_{2}$ $⇋$ 2NO + 3 $H_{2}$ O in terms of $K_{1} K_{2}$ and $K_{3}$ is:

Discussion

39.	The no. Of local Maxima in the radial distribution curve of 5d orbital is
Answer» The no. Of local Maxima in the radial distribution curve of 5d orbital is

Discussion

40.	Why is the carbon in carbonium ion sp2 hybridised?
Answer» Why is the carbon in carbonium ion sp2 hybridised?

Discussion

41.	For the reaction N2O4(g)⇋2NO2(g), if percentage dissociation of N2O4 are 20% 45%, 65 & 80% , then the sequence of vapor densities,
Answer» For the reaction $N_{2} O_{4} (g) ⇋ 2 N O_{2} (g),$ if percentage dissociation of $N_{2} O_{4}$ are 20% 45%, 65 & 80% , then the sequence of vapor densities,

Discussion

42.	The number of Onto functions, f:{a, b, c, d} to {p, q, r} , is
Answer» The number of Onto functions, f:{a, b, c, d} to {p, q, r} , is

Discussion

43.	Give the binomial nomenclature of two types of yeasts and the commercial bioactive products they help to produce. [2]
Answer» Give the binomial nomenclature of two types of yeasts and the commercial bioactive products they help to produce. [2]

Discussion

44.	Which of the following oxides of nitrogen can dimerise?
Answer» Which of the following oxides of nitrogen can dimerise?

Discussion

45.	Which of the following statements are not true? (a) Vacancy defect results in a decrease in the density of the substance (b) Interstitial defects result in an increase in the density of the substance (c) Impurity defect has no effect on the density of the substance (d) Frenkel defect results in an increase in the density of the substance
Answer» Which of the following statements are not true? (a) Vacancy defect results in a decrease in the density of the substance (b) Interstitial defects result in an increase in the density of the substance (c) Impurity defect has no effect on the density of the substance (d) Frenkel defect results in an increase in the density of the substance

45.

Which of the following statements are not true? (a) Vacancy defect results in a decrease in the density of the substance (b) Interstitial defects result in an increase in the density of the substance (c) Impurity defect has no effect on the density of the substance (d) Frenkel defect results in an increase in the density of the substance

Answer»

Which of the following statements are not true?

(a) Vacancy defect results in a decrease in the density of the substance

(b) Interstitial defects result in an increase in the density of the substance

(c) Impurity defect has no effect on the density of the substance

(d) Frenkel defect results in an increase in the density of the substance

Discussion

46.	Discuss the factors affecting electron gain enthalpy and the trend in its variation in the periodic table.
Answer» Discuss the factors affecting electron gain enthalpy and the trend in its variation in the periodic table.

Discussion

47.	Roasting of ZnS at 700∘ C liberates a gas that usually turns lime water milky. Name the gas.
Answer» Roasting of ZnS at $700^{\circ}$ C liberates a gas that usually turns lime water milky. Name the gas.

Discussion

48.	which has higest aromatic character 1. pyrol 2. furane 3. thiophene
Answer» which has higest aromatic character 1. pyrol 2. furane 3. thiophene

48.

which has higest aromatic character 1. pyrol 2. furane 3. thiophene

Answer»

which has higest aromatic character

1. pyrol

2. furane

3. thiophene

Discussion

49.	Cl2(chlorine) gas obtained by various reaction but not by 1)KMnO4+ conc. HCl 2)KCl +K2Cr2O7+conc.H2SO4 3)MnO2 +conc. HCl 4)KCl + F2
Answer» _{Cl2(chlorine) gas obtained by various reaction but not by 1)KMnO4+ conc. HCl 2)KCl +K2Cr2O7+conc.H2SO4 3)MnO2 +conc. HCl 4)KCl + F2}

Discussion

50.	Iodination product decomposes quickly.why?
Answer» Iodination product decomposes quickly.why?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Why does Mn in oxide exhibit higher oxidation state than fluoride?

How many molecules are synthesized by 1 molecule of acetyl Co-A and how?

The physical constant, ___________ is less for D2O as compared to that of H2O.

The shape of covalent molecule MX3 is

Isopropyl alcohol on oxidation forms:

The internal energy of a given mass of gas in a system depends upon

The compressibility factor for a van der Waal’s gas at the critical point is:

Which of the following dipolar structure of the amino acid is considered to be more correct ?

The decomposition of phosphine (PH3)on tungsten at low pressure is a first-order reaction. It is because the:

Schottky defect generally appears in[DCE 2004]

The compound that will behave as an acid in H2SO4 is:

For the reaction Cl2+2I–→I2+2Cl–, the initial concentration of I– was 0.2 mol L–1 and the concentration after 20 min was 0.18 mol L–1. The rate of formation of l2 in mol L–1 min–1 would be

In the reaction S+32O2→SO3+2xkJ and SO2+12O2→SO3+ykJ Heat of formation of SO2 is

On acetylation of A, the product obtained is:

When mercury is heated with aqua regia then which compound is formed?

Which of the following is an example of rearrangement reaction?

Which of the following compound is expected to be most basic [NCERT 1982]

1000 g impure sample of NaOH contains 3 mol of oxygen atoms. The % purity of the sample is:

Which of the following reaction(s) will give an ester as the final product?

A sample of a pure compound has 1.15 gm of sodium, 3.01×1022 atoms of carbon and 0.1 mol of oxygen atoms. Its empirical formula is:

Which of the following ketones has the largest equilibrium constant for addition of water?

Q. Smallest among these species is: Options: A. Lithium ion B. Hydrogen C. Lithium D. Helium

A 821 mL N2 (g) was collected over liquid water at 300 K and 1 atm. If the vapour pressure of H2O is 30 torr then number of moles of N2 (g) in the moist gas mixture is:

The order of covalent bond character for LiCl,BeCl2,BCl3 and CCl4 is:

Which of the following is not a state function

The state of a mole of an ideal gas changed from state A(2p,v) through four different processes and finally return to initial state A reversibly as shown below. Calculate the total work done by the system and heat absorbed by the system in the cyclic process respectively.

Why Fe2+ radialy oxidises to Fe3+??

On catalytic hydrogenation ethylene gives ethane. During this reaction hybridization of carbon atoms changes from SP2 to SP3 bond angle decreases from 120 to 109.5 C-C Bond length increases from 1.34 A° to 1.54 A° all of these

Calculate the molarity of the solution obtained on mixing 100 mL of 0.1 M H2SO4 with 50 mL of 0.1 M NaOH.

Which of the following is the correct order for heat of hydrogenation of these compounds?

Specify the coordination geometry around and hybridization of N and B atoms in a 1:1 complex of BF3 and NH3

Group 14 elements has the following electronic configuration:

By how much will the potential of half cell cu+2/Cu change, if the solution is diluted to 100 times at 298 K? (1) Increases by 59 mV (2) Decreases by 59 mV (3) Increases by 29.5 mv (4) Decreases by 29.5 mV

What is penetration effect?

In bohr series of lines of hydrogen spectrum the third line from the red end corresponds to which inter Orbit jumps of the electron for bohr Orbit in an atom of Hydrogen

The following equilibria are given: N2 +3H2 ⇋ 2NH3 K1 ; N2 + O2 ⇋ 2NO K2 ; H2 + 12 O2 ⇋ H2OK3 ; The Equilibrium constant for the reaction 2NH3 + 52 O2 ⇋ 2NO + 3H2 O in terms of K1K2 and K3 is:

The no. Of local Maxima in the radial distribution curve of 5d orbital is

Why is the carbon in carbonium ion sp2 hybridised?

For the reaction N2O4(g)⇋2NO2(g), if percentage dissociation of N2O4 are 20% 45%, 65 &amp; 80% , then the sequence of vapor densities,

The number of Onto functions, f:{a, b, c, d} to {p, q, r} , is

Give the binomial nomenclature of two types of yeasts and the commercial bioactive products they help to produce. [2]

Which of the following oxides of nitrogen can dimerise?

Discuss the factors affecting electron gain enthalpy and the trend in its variation in the periodic table.

Roasting of ZnS at 700∘ C liberates a gas that usually turns lime water milky. Name the gas.

which has higest aromatic character 1. pyrol 2. furane 3. thiophene

Cl2​​​​(chlorine) gas obtained by various reaction but not by 1)KMnO4+ conc. HCl 2)KCl +K2Cr2O7+conc.H2SO4 3)MnO2 +conc. HCl 4)KCl + F2

Iodination product decomposes quickly.why?

For the reaction N2O4(g)⇋2NO2(g), if percentage dissociation of N2O4 are 20% 45%, 65 & 80% , then the sequence of vapor densities,

Cl2(chlorine) gas obtained by various reaction but not by 1)KMnO4+ conc. HCl 2)KCl +K2Cr2O7+conc.H2SO4 3)MnO2 +conc. HCl 4)KCl + F2