46295 + Interview Questions in Chemistry

1.	Translate the following statement into chemical equation and balance it: Hydrogen sulphide gas burns in air to give water and sulphur dioxide.
Answer» Translate the following statement into chemical equation and balance it: Hydrogen sulphide gas burns in air to give water and sulphur dioxide.

Discussion

2.	In the reaction A++ B→A+B+, there is no entropy change. If enthalpy change is 22kJ/mol, calculate △G for the reaction.
Answer» In the reaction $A^{+} + B \to A + B^{+},$ there is no entropy change. If enthalpy change is $22 k J / m o l$ , calculate $△ G$ for the reaction.

Discussion

3.	Is boric acid a protic acid? Explain.
Answer» Is boric acid a protic acid? Explain.

Discussion

4.	Major product obtained in given reaction is
Answer» Major product obtained in given reaction is

Discussion

5.	Which of the following compounds does not give oxygen on heating ?
Answer» Which of the following compounds does not give oxygen on heating ?

Discussion

6.	What is resonance ? And why does it occurs ?
Answer» What is resonance ? And why does it occurs ?

Discussion

7.	Ligands can be
Answer» Ligands can be

Discussion

8.	IUPAC name of the hydrocarbon (A) is
Answer» IUPAC name of the hydrocarbon (A) is

Discussion

9.	Knowing the electron gain enthalpy values for O→O− and O→O−2 as -141 and 702 kJ mol−1 respectively, how can you account for the formation of a large number of oxides having O2− species and not O− ?
Answer» Knowing the electron gain enthalpy values for $O \to O^{-}$ and $O \to O^{- 2}$ as -141 and 702 kJ $m o l^{- 1}$ respectively, how can you account for the formation of a large number of oxides having $O^{2 -}$ species and not $O^{-}$ ?

Discussion

10.	Question 24 4 L of 0.02 M aqueous solution of NaCl was diluted by adding 1 L of water. The molality of the resultant solution is ........ . (a) 0.004 (b) 0.008 (c) 0.012 (d) 0.016
Answer» Question 24 4 L of 0.02 M aqueous solution of NaCl was diluted by adding 1 L of water. The molality of the resultant solution is ........ . (a) 0.004 (b) 0.008 (c) 0.012 (d) 0.016

Discussion

11.	Which one has maximum electron affinity
Answer» Which one has maximum electron affinity

11.

Which one has maximum electron affinity

Answer»

Which one has maximum electron affinity

Discussion

12.	The plot given below shows P - T curves (where P is pressure and T is the temperature) for two solvents X and Y and isomolal solutions of NaCl in these solvents. NaCl completely dissociates in both the solvents. On addition of equal number of moles of a non-volatile solute S in equal amount (in kg) of these solvents, the elevation of boiling point of solvent X is three times than that of solvent Y. Solute S is known to undergo dimerization in these solvents. If the degree of dimerization is 0.7 in solvent Y, the degree of dimerization in solvent X is:
Answer» The plot given below shows P - T curves (where P is pressure and T is the temperature) for two solvents X and Y and isomolal solutions of $N a C l$ in these solvents. $N a C l$ completely dissociates in both the solvents. On addition of equal number of moles of a non-volatile solute S in equal amount (in kg) of these solvents, the elevation of boiling point of solvent X is three times than that of solvent Y. Solute S is known to undergo dimerization in these solvents. If the degree of dimerization is 0.7 in solvent Y, the degree of dimerization in solvent X is:

Discussion

13.	The probability factor for the replacement of hydrogen atom during chlorination/bromination is
Answer» The probability factor for the replacement of hydrogen atom during chlorination/bromination is

Discussion

14.	Why do we need to classify drugs in different ways ?
Answer» Why do we need to classify drugs in different ways ?

Discussion

15.	Among CaH2,NH3,NaH and B2H6, which are covalent hydride?
Answer» Among $C a H_{2}, N H_{3}, N a H a n d B_{2} H_{6}$ , which are covalent hydride?

Discussion

16.	The phase difference between the two particles situated on both the sides of a node is
Answer» The phase difference between the two particles situated on both the sides of a node is

Discussion

17.	In the precipitation of sulphides of second group of basic radiacals, H2S passed into the acidified solution with dilute HCl. If the solution is not acidified, then which is the correct statement ?
Answer» In the precipitation of sulphides of second group of basic radiacals, $H_{2} S$ passed into the acidified solution with dilute HCl. If the solution is not acidified, then which is the correct statement ?

Discussion

18.	The root mean square velocity of a gas molecule of mass m at a given temperature is proportional to
Answer» The root mean square velocity of a gas molecule of mass m at a given temperature is proportional to

18.

The root mean square velocity of a gas molecule of mass m at a given temperature is proportional to

Answer»

The root mean square velocity of a gas molecule of mass m at a given temperature is proportional to

Discussion

19.	Which among the following methods is most suitable for the separation of two miscible liquids?
Answer» Which among the following methods is most suitable for the separation of two miscible liquids?

Discussion

20.	Do you expect different products in solution when aluminium (III) chloride and potassium chloride treated separately with (i) normal water (ii) acidified water, and (iii) alkaline water? Write equations wherever necessary.
Answer» Do you expect different products in solution when aluminium (III) chloride and potassium chloride treated separately with (i) normal water (ii) acidified water, and (iii) alkaline water? Write equations wherever necessary.

Discussion

21.	According to kinetic theory of gases,
Answer» According to kinetic theory of gases,

Discussion

22.	Calculate the equilibrium constant (Keq) for the following reaction: H2(g)+I2→2HI(g) When the equilibrium concentrations at 25∘ C were found to be: [H2] = 0.0505 M [I2] = 0.0498 M [HI] = 0.389 M
Answer» Calculate the equilibrium constant $(K_{e q})$ for the following reaction: $H_{2} (g) + I_{2} \to 2 H I (g)$ When the equilibrium concentrations at $25^{\circ} C$ were found to be: $[H_{2}]$ = 0.0505 M $[I_{2}]$ = 0.0498 M [HI] = 0.389 M

Discussion

23.	A solution of sucrose (molar mass = 342 g/mol) is prepared by dissolving 68.4 g of it per litre of the solution. What is its osmotic pressure (R = 0.082 lit. atm.k-1mol-1) at 273 K?
Answer» A solution of sucrose (molar mass = 342 g/mol) is prepared by dissolving 68.4 g of it per litre of the solution. What is its osmotic pressure (R = 0.082 lit. atm.k^-1mol^-1) at 273 K?

23.

A solution of sucrose (molar mass = 342 g/mol) is prepared by dissolving 68.4 g of it per litre of the solution. What is its osmotic pressure (R = 0.082 lit. atm.k-1mol-1) at 273 K?

Answer»

A solution of sucrose (molar mass = 342 g/mol) is prepared by dissolving 68.4 g of it per litre of the solution. What is its osmotic pressure (R = 0.082 lit. atm.k^-1mol^-1) at 273 K?

Discussion

24.	Stability of ions of Ge,Sn, and Pb will be in the order:
Answer» Stability of ions of $G e, S n, a n d P b$ will be in the order:

Discussion

25.	Which of the following has/have enol content higer than methyl-3-oxobutanoate?
Answer» Which of the following has/have enol content higer than methyl-3-oxobutanoate?

Discussion

26.	A mixture of ideal gas containing 5 moles of monatomic gas and 1 mole of rigid diatomic gas is initially at pressure P0, volume V0 and temperature T0. If the gas mixture is adiabatically compressed to a volume V0/4, then the correct statement(s) is/are,(Given 21.2=2.3;23.2=9.2;R is gas constant)
Answer» A mixture of ideal gas containing 5 moles of monatomic gas and 1 mole of rigid diatomic gas is initially at pressure $P_{0}$ , volume $V_{0}$ and temperature $T_{0}$ . If the gas mixture is adiabatically compressed to a volume $V_{0} / 4$ , then the correct statement(s) is/are, (Given $2^{1.2} = 2.3; 2^{3.2} = 9.2; R$ is gas constant)

Discussion

27.	Lead nitrate on heating gives lead oxide, NO2 and oxygen. This reaction is
Answer» Lead nitrate on heating gives lead oxide, $N O_{2}$ and oxygen. This reaction is

Discussion

28.	In the extraction of iron, limestone is added as:
Answer» In the extraction of iron, limestone is added as:

Discussion

29.	Here A is
Answer» Here A is

29.

Here A is

Answer»

Here A is

Discussion

30.	The oxidation state of O in OF2is:
Answer» The oxidation state of O in $O F_{2}$ is:

Discussion

31.	Which element has the highest electronegativity
Answer» Which element has the highest electronegativity

31.

Which element has the highest electronegativity

Answer»

Which element has the highest electronegativity

Discussion

32.	Which of the following reagent is used to identify fructose?
Answer» Which of the following reagent is used to identify fructose?

Discussion

33.	A solution of K2Cr2O7 acidified with H2SO4 when treated with a substance 'X', gives a blue coloured solution of 'Y'. The substance 'X' and the oxidation state of central atom of compound 'Y' are respectively:
Answer» A solution of $K_{2} C r_{2} O_{7}$ acidified with $H_{2} S O_{4}$ when treated with a substance 'X', gives a blue coloured solution of 'Y'. The substance 'X' and the oxidation state of central atom of compound 'Y' are respectively:

Discussion

34.	The molecular formula of a commercial resin used for exchanging ions in water softening is C8H7SO3Na (Mol. wt. 206). What would be the maximum uptake of Ca2+ ions by the resin when expressed in mole per gram resin?
Answer» The molecular formula of a commercial resin used for exchanging ions in water softening is $C_{8} H_{7} S O_{3} N a$ (Mol. wt. 206). What would be the maximum uptake of $C a^{2 +}$ ions by the resin when expressed in mole per gram resin?

Discussion

35.	A certain mass of gas is expanded from (1L, 10 atm) to (4L, 5 atm) against a constant external pressure of 1 atm. If initial temperature of gas is 300K and the heat capacity of process is 50 J/∘C. Then the enthalpy change during the process is: (1L atm = 100 J)
Answer» A certain mass of gas is expanded from (1L, 10 atm) to (4L, 5 atm) against a constant external pressure of 1 atm. If initial temperature of gas is 300K and the heat capacity of process is $50 J /^{\circ} C$ . Then the enthalpy change during the process is: (1L atm = 100 J)

Discussion

36.	Consider the reactions (i) (CH3)2CH−CH2BrC2H5OH−−−−−→(CH3)2CH−CH2OC2H5+HBr (ii) (CH3)2CH−CH2BrC2HSO−−−−−−→(CH3)2 CH CH2OC2H5+Br− The mechanism of reactions (i) & (ii) are respectively
Answer» Consider the reactions (i) $(C H_{3})_{2} C H - C H_{2} B r C_{2} H_{5} O H - ---- \to (C H_{3})_{2} C H - C H_{2} O C_{2} H_{5} + H B r$ (ii) $(C H_{3})_{2} C H - C H_{2} B r C_{2} H_{S} O^{-} - ---- \to (C H_{3})_{2} C H C H_{2} O C_{2} H_{5} + B r^{-}$ The mechanism of reactions (i) & (ii) are respectively

36.

Consider the reactions (i) (CH3)2CH−CH2BrC2H5OH−−−−−→(CH3)2CH−CH2OC2H5+HBr (ii) (CH3)2CH−CH2BrC2HSO−−−−−−→(CH3)2 CH CH2OC2H5+Br− The mechanism of reactions (i) & (ii) are respectively

Answer»

Consider the reactions

(i) $(C H_{3})_{2} C H - C H_{2} B r C_{2} H_{5} O H - ---- \to (C H_{3})_{2} C H - C H_{2} O C_{2} H_{5} + H B r$

(ii) $(C H_{3})_{2} C H - C H_{2} B r C_{2} H_{S} O^{-} - ---- \to (C H_{3})_{2} C H C H_{2} O C_{2} H_{5} + B r^{-}$

The mechanism of reactions (i) & (ii) are respectively

Discussion

37.	If 'Z' is orange coloured compound then 'X', 'Y' and 'Z' are
Answer» If 'Z' is orange coloured compound then 'X', 'Y' and 'Z' are

Discussion

38.	Peptidoglycan is made up of.......................
Answer» Peptidoglycan is made up of.......................

Discussion

39.	For an adiabatic, irreversible, free expansion which of the following is/are true
Answer» For an adiabatic, irreversible, free expansion which of the following is/are true

Discussion

40.	Following compounds are given Which of the above compounds on being warmed with iodine solution and NaOH will give Iodoform?
Answer» Following compounds are given Which of the above compounds on being warmed with iodine solution and NaOH will give Iodoform?

40.

Following compounds are given Which of the above compounds on being warmed with iodine solution and NaOH will give Iodoform?

Answer»

Following compounds are given

Which of the above compounds on being warmed with iodine solution and NaOH will give Iodoform?

Discussion

41.	Name any one reagent to distinguish aldehydes and ketones.
Answer» Name any one reagent to distinguish aldehydes and ketones.

Discussion

42.	An ideal diatomic gas is expanded so that the amount of heat transferred to the gas is equal to the decrease in its internal energy. The process can be represented by the equation TVn= constant, where the value of n is
Answer» An ideal diatomic gas is expanded so that the amount of heat transferred to the gas is equal to the decrease in its internal energy. The process can be represented by the equation $T V^{n}$ = constant, where the value of n is

Discussion

43.	The amine formed from an amide by means of bromine and alkali has
Answer» The amine formed from an amide by means of bromine and alkali has

Discussion

44.	Which of following graphs correctly depicts the variation of Gibbs Free Energy with extent of the Reaction ?
Answer» Which of following graphs correctly depicts the variation of Gibbs Free Energy with extent of the Reaction ?

Discussion

45.	The atomic number of V, Cr, Mn and Fe are 23, 24, 25 and 26 respectively . Which one of these may be expected to have the highest second ionisation enthalpy?
Answer» The atomic number of $V, C r, M n$ and $F e$ are 23, 24, 25 and 26 respectively . Which one of these may be expected to have the highest second ionisation enthalpy?

Discussion

46.	Sec. butyl chloride will undergo alkaline hydrolysis in the polar solvent by
Answer» Sec. butyl chloride will undergo alkaline hydrolysis in the polar solvent by

Discussion

47.	Body centered cubic lattice has a coordination number of[AIIMS 1996; MP PMT 2002]
Answer» Body centered cubic lattice has a coordination number of [AIIMS 1996; MP PMT 2002]

47.

Body centered cubic lattice has a coordination number of[AIIMS 1996; MP PMT 2002]

Answer»

Body centered cubic lattice has a coordination number of

[AIIMS 1996; MP PMT 2002]

Discussion

48.	The substance which does not show sharp melting point is
Answer» The substance which does not show sharp melting point is

Discussion

49.	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

50.	How can you determine the atomic mass of an unknown metal if you know its density and the dimension of its unit cell ? Explain.
Answer» How can you determine the atomic mass of an unknown metal if you know its density and the dimension of its unit cell ? Explain.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Translate the following statement into chemical equation and balance it: Hydrogen sulphide gas burns in air to give water and sulphur dioxide.

In the reaction A++ B→A+B+, there is no entropy change. If enthalpy change is 22kJ/mol, calculate △G for the reaction.

Is boric acid a protic acid? Explain.

Major product obtained in given reaction is

Which of the following compounds does not give oxygen on heating ?

What is resonance ? And why does it occurs ?

Ligands can be

IUPAC name of the hydrocarbon (A) is

Knowing the electron gain enthalpy values for O→O− and O→O−2 as -141 and 702 kJ mol−1 respectively, how can you account for the formation of a large number of oxides having O2− species and not O− ?

Question 24 4 L of 0.02 M aqueous solution of NaCl was diluted by adding 1 L of water. The molality of the resultant solution is ........ . (a) 0.004 (b) 0.008 (c) 0.012 (d) 0.016

Which one has maximum electron affinity

The probability factor for the replacement of hydrogen atom during chlorination/bromination is

Why do we need to classify drugs in different ways ?

Among CaH2,NH3,NaH and B2H6, which are covalent hydride?

The phase difference between the two particles situated on both the sides of a node is

In the precipitation of sulphides of second group of basic radiacals, H2S passed into the acidified solution with dilute HCl. If the solution is not acidified, then which is the correct statement ?

The root mean square velocity of a gas molecule of mass m at a given temperature is proportional to

Which among the following methods is most suitable for the separation of two miscible liquids?

Do you expect different products in solution when aluminium (III) chloride and potassium chloride treated separately with (i) normal water (ii) acidified water, and (iii) alkaline water? Write equations wherever necessary.

According to kinetic theory of gases,

Calculate the equilibrium constant (Keq) for the following reaction: H2(g)+I2→2HI(g) When the equilibrium concentrations at 25∘ C were found to be: [H2] = 0.0505 M [I2] = 0.0498 M [HI] = 0.389 M

A solution of sucrose (molar mass = 342 g/mol) is prepared by dissolving 68.4 g of it per litre of the solution. What is its osmotic pressure (R = 0.082 lit. atm.k-1mol-1) at 273 K?

Stability of ions of Ge,Sn, and Pb will be in the order:

Which of the following has/have enol content higer than methyl-3-oxobutanoate?

A mixture of ideal gas containing 5 moles of monatomic gas and 1 mole of rigid diatomic gas is initially at pressure P0, volume V0 and temperature T0. If the gas mixture is adiabatically compressed to a volume V0/4, then the correct statement(s) is/are,(Given 21.2=2.3;23.2=9.2;R is gas constant)

Lead nitrate on heating gives lead oxide, NO2 and oxygen. This reaction is

In the extraction of iron, limestone is added as:

Here A is

The oxidation state of O in OF2is:

Which element has the highest electronegativity

Which of the following reagent is used to identify fructose?

A solution of K2Cr2O7 acidified with H2SO4 when treated with a substance 'X', gives a blue coloured solution of 'Y'. The substance 'X' and the oxidation state of central atom of compound 'Y' are respectively:

The molecular formula of a commercial resin used for exchanging ions in water softening is C8H7SO3Na (Mol. wt. 206). What would be the maximum uptake of Ca2+ ions by the resin when expressed in mole per gram resin?

A certain mass of gas is expanded from (1L, 10 atm) to (4L, 5 atm) against a constant external pressure of 1 atm. If initial temperature of gas is 300K and the heat capacity of process is 50 J/∘C. Then the enthalpy change during the process is: (1L atm = 100 J)

Consider the reactions (i) (CH3)2CH−CH2BrC2H5OH−−−−−→(CH3)2CH−CH2OC2H5+HBr (ii) (CH3)2CH−CH2BrC2HSO−−−−−−→(CH3)2 CH CH2OC2H5+Br− The mechanism of reactions (i) &amp; (ii) are respectively

If 'Z' is orange coloured compound then 'X', 'Y' and 'Z' are

Peptidoglycan is made up of.......................

For an adiabatic, irreversible, free expansion which of the following is/are true

Following compounds are given Which of the above compounds on being warmed with iodine solution and NaOH will give Iodoform?

Name any one reagent to distinguish aldehydes and ketones.

An ideal diatomic gas is expanded so that the amount of heat transferred to the gas is equal to the decrease in its internal energy. The process can be represented by the equation TVn= constant, where the value of n is

The amine formed from an amide by means of bromine and alkali has

Which of following graphs correctly depicts the variation of Gibbs Free Energy with extent of the Reaction ?

The atomic number of V, Cr, Mn and Fe are 23, 24, 25 and 26 respectively . Which one of these may be expected to have the highest second ionisation enthalpy?

Sec. butyl chloride will undergo alkaline hydrolysis in the polar solvent by

Body centered cubic lattice has a coordination number of[AIIMS 1996; MP PMT 2002]

The substance which does not show sharp melting point is

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

How can you determine the atomic mass of an unknown metal if you know its density and the dimension of its unit cell ? Explain.

Consider the reactions (i) (CH3)2CH−CH2BrC2H5OH−−−−−→(CH3)2CH−CH2OC2H5+HBr (ii) (CH3)2CH−CH2BrC2HSO−−−−−−→(CH3)2 CH CH2OC2H5+Br− The mechanism of reactions (i) & (ii) are respectively