46295 + Interview Questions in Chemistry

1.	What is the enthalpy of bond dissociation per kilojoule mole inverse at 298.2 Kelvin of tritium?
Answer» What is the enthalpy of bond dissociation per kilojoule mole inverse at 298.2 Kelvin of tritium?

Discussion

2.	The ratio of nucleons in O16 and O18 is :
Answer» The ratio of nucleons in $O^{16} a n d O^{18}$ is :

Discussion

3.	A subshell with n = 6, ℓ = 2 can accommodate a maximum of
Answer» A subshell with n = 6, ℓ = 2 can accommodate a maximum of

Discussion

4.	In Bohr series of lines of hydrogen spectrum, the emission of a line from the red end corresponds to which one of the following inner-orbit jump of the electron in a hydrogen atom?
Answer» In Bohr series of lines of hydrogen spectrum, the emission of a line from the red end corresponds to which one of the following inner-orbit jump of the electron in a hydrogen atom?

Discussion

5.	Calculate q (in joules), for the reversible isothermal expansion of one mole of an ideal gas 27oC from a volume of 10 dm3 to a volume of 20 dm3.
Answer» Calculate $q$ (in joules), for the reversible isothermal expansion of one mole of an ideal gas $27^{o} C$ from a volume of 10 $d m^{3}$ to a volume of $20 d m^{3}$ .

Discussion

6.	Allyl Isocyandie contains σ and π bonds respectively as
Answer» Allyl Isocyandie contains σ and $π$ bonds respectively as

Discussion

7.	Why is IE of O less than N?
Answer» Why is IE of O less than N?

Discussion

8.	The standard cell potential for Zn\|Zn2+\|\|Cu2+\|Cu is 1.10V. When the cell is completely discharged, log[Zn2+][Cu2+] is closest to
Answer» The standard cell potential for $Z n \| Z n^{2 +} \| \| C u^{2 +} \| C u i s 1.10 V .$ When the cell is completely discharged, $l o g \frac{[Z n^{2 +}]}{[C u^{2 +}]}$ is closest to

Discussion

9.	Match the compounds given in Column I with their uses mentioned in Column II ColumnIColumnIIA.CaCO31.Dentistry ,ornamental workB.Ca(OH)22.Manufacture of sodium carbonateC.CaO3.Manufacture of high quality paperD.CaSO44.Used in white washing
Answer» Match the compounds given in Column I with their uses mentioned in Column II $\begin{matrix} C o l u m n I & C o l u m n I I A . C a C O_{3} & 1. D e n t i s t r y, o r n a m e n t a l w o r k B . C a (O H)_{2} & 2. M a n u f a c t u r e o f s o d i u m c a r b o n a t e C . C a O & 3. M a n u f a c t u r e o f h i g h q u a l i t y p a p e r D . C a S O_{4} & 4. U s e d i n w h i t e w a s h i n g \end{matrix}$

Discussion

10.	An element having electronic configuration 1s2, 2s2 2p6, 3s2 3p6, 4s1 forms
Answer» An element having electronic configuration 1s², 2s² 2p⁶, 3s² 3p⁶, 4s¹ forms

Discussion

11.	The dissociation constant of a weak acid is 1.0 × 10−5. The equilibrium constant for the reaction with strong base is
Answer» The dissociation constant of a weak acid is $1.0 \times 10^{- 5}$ . The equilibrium constant for the reaction with strong base is

11.

The dissociation constant of a weak acid is 1.0 × 10−5. The equilibrium constant for the reaction with strong base is

Answer»

The dissociation constant of a weak acid is $1.0 \times 10^{- 5}$ . The equilibrium

constant for the reaction with strong base is

Discussion

12.	Explain tropospheric pollution in 100 words.
Answer» Explain tropospheric pollution in 100 words.

Discussion

13.	According to Graham’s law of diffusion, at a given temp the ratio of rates of diffusion rA/rB of gases A and B is given by
Answer» According to Graham’s law of diffusion, at a given temp the ratio of rates of diffusion $r_{A} / r_{B}$ of gases A and B is given by

Discussion

14.	A solid AB has NaCl type structure. If the radius of cation A is 100 pm, then the radius of the anion B will be
Answer» A solid AB has NaCl type structure. If the radius of cation A is 100 pm, then the radius of the anion B will be

Discussion

15.	Write the important structural and functional differences between DNA and RNA.
Answer» Write the important structural and functional differences between DNA and RNA.

Discussion

16.	Choose the product(s) formed by action of Na2CO3 and H3BO3
Answer» Choose the product(s) formed by action of $N a_{2} C O_{3}$ and $H_{3} B O_{3}$

Discussion

17.	2VO+3Fe2O3 → 6FeO+V2O5. If we start with 2 g of VO and 6 g of Fe2O3, is the limiting reagent. [V = 48 g] [Fe = 56 g]
Answer» $2 V O + 3 F e_{2} O_{3} \to 6 F e O + V_{2} O_{5}$ . If we start with 2 g of $V O$ and 6 g of $F e_{2} O_{3}$ , is the limiting reagent. [V = 48 g] [Fe = 56 g]

Discussion

18.	The step which is not involved in dehydration of alcohol is:
Answer» The step which is not involved in dehydration of alcohol is:

Discussion

19.	Describe the manufucature of H2SO4 by contact process,
Answer» Describe the manufucature of $H_{2} S O_{4}$ by contact process,

Discussion

20.	In the following question, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question. Assertion (A) Three states of matter are the result of the balance between intermolecular forces and thermal energy of the molecules. Reason (R) Intermolecular forces tend to keep the molecules together but the thermal energy of molecules tends to keep them apart. (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true and R is not the correct explanation of A (c) A is true but R is false (d) A is false but R is true
Answer» In the following question, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question. Assertion (A) Three states of matter are the result of the balance between intermolecular forces and thermal energy of the molecules. Reason (R) Intermolecular forces tend to keep the molecules together but the thermal energy of molecules tends to keep them apart. (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true and R is not the correct explanation of A (c) A is true but R is false (d) A is false but R is true

20.

In the following question, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question. Assertion (A) Three states of matter are the result of the balance between intermolecular forces and thermal energy of the molecules. Reason (R) Intermolecular forces tend to keep the molecules together but the thermal energy of molecules tends to keep them apart. (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true and R is not the correct explanation of A (c) A is true but R is false (d) A is false but R is true

Answer»

In the following question, a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below in each question.

Assertion (A) Three states of matter are the result of the balance between intermolecular forces and thermal energy of the molecules.

Reason (R) Intermolecular forces tend to keep the molecules together but the thermal energy of molecules tends to keep them apart.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true and R is not the correct explanation of A

(c) A is true but R is false

(d) A is false but R is true

Discussion

21.	The decomposition reaction 2N2O5(g)Δ−→2N2O4(g)+O2(g) is started in a closed cylinder under isothermal isochoric condition at an initial pressure of 1 atm. After Y×103s, the pressure inside the cylinder is found to be 1.45 atm. If the rate constant of the reaction is 5×10−4s−1, assuming ideal gas behaviour, the value of Y is
Answer» The decomposition reaction $2 N_{2} O_{5} (g) Δ - \to 2 N_{2} O_{4} (g) + O_{2} (g)$ is started in a closed cylinder under isothermal isochoric condition at an initial pressure of $1 a t m$ . After $Y \times 10^{3} s$ , the pressure inside the cylinder is found to be $1.45 a t m$ . If the rate constant of the reaction is $5 \times 10^{- 4} s^{- 1}$ , assuming ideal gas behaviour, the value of Y is

Discussion

22.	A solution of known normality is diluted to two times. Which of the following changes during dilution?
Answer» A solution of known normality is diluted to two times. Which of the following changes during dilution?

Discussion

23.	How does the surface tension of a liquid vary with an increase in temperature? (a) Remains same (b) Decreases (c) Increases (d) No regular pattern is followed
Answer» How does the surface tension of a liquid vary with an increase in temperature? (a) Remains same (b) Decreases (c) Increases (d) No regular pattern is followed

23.

How does the surface tension of a liquid vary with an increase in temperature? (a) Remains same (b) Decreases (c) Increases (d) No regular pattern is followed

Answer»

How does the surface tension of a liquid vary with an increase in temperature?

(a) Remains same (b) Decreases

(c) Increases (d) No regular pattern is followed

Discussion

24.	The end product (major) in the following reaction is:
Answer» The end product (major) in the following reaction is:

Discussion

25.	Select the correct option(s) where aromatic product is/are formed.
Answer» Select the correct option(s) where aromatic product is/are formed.

Discussion

26.	Anomalous behaviour of Boron is due to
Answer» Anomalous behaviour of Boron is due to

Discussion

27.	Explain the formation of H2 molecule on the basis of valence bond theory.
Answer» Explain the formation of $H_{2}$ molecule on the basis of valence bond theory.

Discussion

28.	Consider the reactions: The final product contains the functional groups:
Answer» Consider the reactions: The final product contains the functional groups:

Discussion

29.	What is the relative atomic mass and atomic mass of calcium?
Answer» What is the relative atomic mass and atomic mass of calcium?

Discussion

30.	Phenol is
Answer» Phenol is

Discussion

31.	For a van der Waal's gas Vc=3b, Pc=a27b2 Tc=8a27bR. Numerically the compressibility factor of a van der Waals gas at the critical points is:
Answer» For a van der Waal's gas $V_{c} = 3 b, P_{c} = \frac{a}{27 b^{2}}$ $T_{c} = \frac{8_{a}}{27 b R}$ . Numerically the compressibility factor of a van der Waals gas at the critical points is:

Discussion

32.	When aniline is treated with acetyl chloride in presence of anhydrous aluminium chloride, the main product is
Answer» When aniline is treated with acetyl chloride in presence of anhydrous aluminium chloride, the main product is

Discussion

33.	How many moles of H3PO4 are obtained by hydrolysing two moles of P4O8?
Answer» How many moles of $H_{3} P O_{4}$ are obtained by hydrolysing two moles of $P_{4} O_{8}$ ?

Discussion

34.	Th234 disintegrates and emits 6β- and 7α-particles to form a stable element. Find the atomic number and mass number of the stable product. Also identify the element. (IIT-JEE, 2004)
Answer» $T h^{234}$ disintegrates and emits 6β- and 7α-particles to form a stable element. Find the atomic number and mass number of the stable product. Also identify the element. (IIT-JEE, 2004)

Discussion

35.	What is the minimum concentration of Ba+2 ions required in order to initiate the precipitation of BaSO4 from a solution containing 0.002 mol L−1 of SO−24 ions? (Given Ksp for BaSO4=1.4×10−10 )
Answer» What is the minimum concentration of $B a^{+ 2}$ ions required in order to initiate the precipitation of $B a S O_{4}$ from a solution containing $0.002 m o l L^{- 1}$ of $S O_{4}^{- 2}$ ions? (Given $K_{s p}$ for $B a S O_{4} = 1.4 \times 10^{- 10}$ )

Discussion

36.	Arrange the following in the increasing order of boiling point.
Answer» Arrange the following in the increasing order of boiling point.

Discussion

37.	The correct order of bond angle is
Answer» The correct order of bond angle is

Discussion

38.	A flask has 10 gas particles out of which four particles are moving at 7 ms−1 and all the remaining ones are moving at the speed of 'x' ms−1. If the Vrms of the gas is 5 ms−1, what is the value of ‘x′ ?
Answer» A flask has 10 gas particles out of which four particles are moving at $7 {ms}^{- 1}$ and all the remaining ones are moving at the speed of $' x' {ms}^{- 1}$ . If the $V_{r m s}$ of the gas is $5 {ms}^{- 1}$ , what is the value of $‘ x^{'}$ ?

Discussion

39.	To 100 mL of 0.1 M H3PO4 200 mL of 0.1 M NaOH was added. Calculate the pH of the resulting solution is Given Ka1=10−3,Ka2=10−8,Ka3=10−13
Answer» To $100 m L$ of $0.1 M$ $H_{3} P O_{4}$ $200 m L$ of $0.1 M$ $N a O H$ was added. Calculate the $p H$ of the resulting solution is $G i v e n K_{a 1} = 10^{- 3}, K_{a 2} = 10^{- 8}, K_{a 3} = 10^{- 13}$

Discussion

40.	An ideal gas is initially at temperature T and volume V and at constant pressure, its volume increases by ΔV due to an increase in temperature by ΔT. The quantity μ=ΔV/VΔT varies with temperature as:
Answer» An ideal gas is initially at temperature $T$ and volume $V$ and at constant pressure, its volume increases by $Δ V$ due to an increase in temperature by $Δ T$ . The quantity $μ = Δ V / V Δ T$ varies with temperature as:

Discussion

41.	The major product of the above reaction is:
Answer» The major product of the above reaction is:

Discussion

42.	The complex [Fe(CN)6]4− absorbs a radiation of 356.40 nm. The pairing energy of the complex is 230 kJ/mol. Then what is the magnitude of the total crystal field splitting energy (in kJ/mol) of the complex? (Given, Plank constant=6.6×10−34Js,NA=6×1023,c=3.0×108 m/s)
Answer» The complex $[F e (C N)_{6}]^{4 -}$ absorbs a radiation of 356.40 nm. The pairing energy of the complex is 230 kJ/mol. Then what is the magnitude of the total crystal field splitting energy (in kJ/mol) of the complex? (Given, $Plank constant = 6.6 \times 10^{- 34} J s, N_{A} = 6 \times 10^{23}, c = 3.0 \times 10^{8} m / s$ )

Discussion

43.	Major product of the reaction given below is
Answer» Major product of the reaction given below is

43.

Major product of the reaction given below is

Answer»

Major product of the reaction given below is

Discussion

44.	The vapour pressure of water depends on:
Answer» The vapour pressure of water depends on:

Discussion

45.	The molecule which has pyramidal shape is :
Answer» The molecule which has pyramidal shape is :

Discussion

46.	In which of the following molecules/ions are all the bonds not equal?
Answer» In which of the following molecules/ions are all the bonds not equal?

Discussion

47.	Nicotinic acid (Ka = 1.4 x 10−5) is represented by the formula HNic. For a solution which contains 0.10 mol of nicotinic acid per 2.0 litre of solution, the percent dissociation is:
Answer» Nicotinic acid (Ka = 1.4 x $10^{- 5}$ ) is represented by the formula HNic. For a solution which contains 0.10 mol of nicotinic acid per 2.0 litre of solution, the percent dissociation is:

Discussion

48.	The electron affinity for inert gases is likely to be:
Answer» The electron affinity for inert gases is likely to be:

Discussion

49.	For a 'd' electron, the orbital angular momentum is
Answer» For a ' $d$ ' electron, the orbital angular momentum is

Discussion

50.	Consider the following reaction, Product (A) is
Answer» Consider the following reaction, Product (A) is

50.

Consider the following reaction, Product (A) is

Answer»

Consider the following reaction,

Product (A) is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

What is the enthalpy of bond dissociation per kilojoule mole inverse at 298.2 Kelvin of tritium?

The ratio of nucleons in O16 and O18 is :

A subshell with n = 6, ℓ = 2 can accommodate a maximum of

In Bohr series of lines of hydrogen spectrum, the emission of a line from the red end corresponds to which one of the following inner-orbit jump of the electron in a hydrogen atom?

Calculate q (in joules), for the reversible isothermal expansion of one mole of an ideal gas 27oC from a volume of 10 dm3 to a volume of 20 dm3.

Allyl Isocyandie contains σ and π bonds respectively as

Why is IE of O less than N?

The standard cell potential for Zn|Zn2+||Cu2+|Cu is 1.10V. When the cell is completely discharged, log[Zn2+][Cu2+] is closest to

Match the compounds given in Column I with their uses mentioned in Column II ColumnIColumnIIA.CaCO31.Dentistry ,ornamental workB.Ca(OH)22.Manufacture of sodium carbonateC.CaO3.Manufacture of high quality paperD.CaSO44.Used in white washing

An element having electronic configuration 1s2, 2s2 2p6, 3s2 3p6, 4s1 forms

The dissociation constant of a weak acid is 1.0 × 10−5. The equilibrium constant for the reaction with strong base is

Explain tropospheric pollution in 100 words.

According to Graham’s law of diffusion, at a given temp the ratio of rates of diffusion rA/rB of gases A and B is given by

A solid AB has NaCl type structure. If the radius of cation A is 100 pm, then the radius of the anion B will be

Write the important structural and functional differences between DNA and RNA.

Choose the product(s) formed by action of Na2CO3 and H3BO3

2VO+3Fe2O3 → 6FeO+V2O5. If we start with 2 g of VO and 6 g of Fe2O3, is the limiting reagent. [V = 48 g] [Fe = 56 g]

The step which is not involved in dehydration of alcohol is:

Describe the manufucature of H2SO4 by contact process,

A solution of known normality is diluted to two times. Which of the following changes during dilution?

How does the surface tension of a liquid vary with an increase in temperature? (a) Remains same (b) Decreases (c) Increases (d) No regular pattern is followed

The end product (major) in the following reaction is:

Select the correct option(s) where aromatic product is/are formed.

Anomalous behaviour of Boron is due to

Explain the formation of H2 molecule on the basis of valence bond theory.

Consider the reactions: The final product contains the functional groups:

What is the relative atomic mass and atomic mass of calcium?

Phenol is

For a van der Waal's gas Vc=3b, Pc=a27b2 Tc=8a27bR. Numerically the compressibility factor of a van der Waals gas at the critical points is:

When aniline is treated with acetyl chloride in presence of anhydrous aluminium chloride, the main product is

How many moles of H3PO4 are obtained by hydrolysing two moles of P4O8?

Th234 disintegrates and emits 6β- and 7α-particles to form a stable element. Find the atomic number and mass number of the stable product. Also identify the element. (IIT-JEE, 2004)

What is the minimum concentration of Ba+2 ions required in order to initiate the precipitation of BaSO4 from a solution containing 0.002 mol L−1 of SO−24 ions? (Given Ksp for BaSO4=1.4×10−10 )

Arrange the following in the increasing order of boiling point.

The correct order of bond angle is

A flask has 10 gas particles out of which four particles are moving at 7 ms−1 and all the remaining ones are moving at the speed of 'x' ms−1. If the Vrms of the gas is 5 ms−1, what is the value of ‘x′ ?

To 100 mL of 0.1 M H3PO4 200 mL of 0.1 M NaOH was added. Calculate the pH of the resulting solution is Given Ka1=10−3,Ka2=10−8,Ka3=10−13

An ideal gas is initially at temperature T and volume V and at constant pressure, its volume increases by ΔV due to an increase in temperature by ΔT. The quantity μ=ΔV/VΔT varies with temperature as:

The major product of the above reaction is:

The complex [Fe(CN)6]4− absorbs a radiation of 356.40 nm. The pairing energy of the complex is 230 kJ/mol. Then what is the magnitude of the total crystal field splitting energy (in kJ/mol) of the complex? (Given, Plank constant=6.6×10−34Js,NA=6×1023,c=3.0×108 m/s)

Major product of the reaction given below is

The vapour pressure of water depends on:

The molecule which has pyramidal shape is :

In which of the following molecules/ions are all the bonds not equal?

Nicotinic acid (Ka = 1.4 x 10−5) is represented by the formula HNic. For a solution which contains 0.10 mol of nicotinic acid per 2.0 litre of solution, the percent dissociation is:

The electron affinity for inert gases is likely to be:

For a 'd' electron, the orbital angular momentum is

Consider the following reaction, Product (A) is