46295 + Interview Questions in Chemistry

1.	The value for Henry’s constant for argon, carbon dioxide, methane and vinyl chloride at 298 K are 40.3 kbar, 1.67 kbar, 0.413 kbar and 0.611 kbar respectively. Which of the gas will be having least solubility?
Answer» The value for Henry’s constant for argon, carbon dioxide, methane and vinyl chloride at 298 K are 40.3 kbar, 1.67 kbar, 0.413 kbar and 0.611 kbar respectively. Which of the gas will be having least solubility?

Discussion

2.	Oxidation of aldehyde gives:
Answer» Oxidation of aldehyde gives:

Discussion

3.	The reaction R-Br + NaCN R-CN + NaBr is an example of:
Answer» The reaction R-Br + NaCN R-CN + NaBr is an example of:

Discussion

4.	Which of the following reagent reacts with aldehyde to give silver mirror test?
Answer» Which of the following reagent reacts with aldehyde to give silver mirror test?

Discussion

5.	Question 17 The electronic configurations of the elements A, B and C are given below. Answer the question on the basis of these configurations. A 1s2 2s2 2p6 B 1s2 2s2 2p6 3s2 3p3 C 1s2 2p6 2p6 3s2 3p5 The bond between B and C will be (a) ionic (b) covalent (c) hydrogen (d) coordinate
Answer» Question 17 The electronic configurations of the elements A, B and C are given below. Answer the question on the basis of these configurations. A $1 s^{2}$ $2 s^{2}$ $2 p^{6}$ B $1 s^{2}$ $2 s^{2}$ $2 p^{6}$ $3 s^{2}$ $3 p^{3}$ C $1 s^{2}$ $2 p^{6}$ $2 p^{6}$ $3 s^{2}$ $3 p^{5}$ The bond between B and C will be (a) ionic (b) covalent (c) hydrogen (d) coordinate

5.

Question 17 The electronic configurations of the elements A, B and C are given below. Answer the question on the basis of these configurations. A 1s2 2s2 2p6 B 1s2 2s2 2p6 3s2 3p3 C 1s2 2p6 2p6 3s2 3p5 The bond between B and C will be (a) ionic (b) covalent (c) hydrogen (d) coordinate

Answer»

Question 17

The electronic configurations of the elements A, B and C are given below. Answer the question on the basis of these configurations.

A $1 s^{2}$ $2 s^{2}$ $2 p^{6}$

B $1 s^{2}$ $2 s^{2}$ $2 p^{6}$ $3 s^{2}$ $3 p^{3}$

C $1 s^{2}$ $2 p^{6}$ $2 p^{6}$ $3 s^{2}$ $3 p^{5}$

The bond between B and C will be

(a) ionic

(b) covalent

(c) hydrogen

(d) coordinate

Discussion

6.	The element belonging to group 17 which sublimes is
Answer» The element belonging to group 17 which sublimes is

Discussion

7.	Mischmetal is an alloy of:
Answer» Mischmetal is an alloy of:

Discussion

8.	The dissociation energy of H2 is 430.53 kJ mol−1. If hydrogen is dissociated by illumination with radiation of wavelength 253.7 nm, the fraction of the radiant energy which will be converted into kinetic energy is given by
Answer» The dissociation energy of $H_{2}$ is 430.53 kJ $m o l^{- 1}$ . If hydrogen is dissociated by illumination with radiation of wavelength 253.7 nm, the fraction of the radiant energy which will be converted into kinetic energy is given by

Discussion

9.	Which one of the following is dibasic acid?
Answer» Which one of the following is dibasic acid?

Discussion

10.	Write the complete symbol for the atom with the given atomic number (Z) and Atomic mass (A) (i) Z = 17, A = 35 (ii) Z = 92, A = 233 (iii) Z = 4, A = 9
Answer» Write the complete symbol for the atom with the given atomic number (Z) and Atomic mass (A) (i) Z = 17, A = 35 (ii) Z = 92, A = 233 (iii) Z = 4, A = 9

10.

Write the complete symbol for the atom with the given atomic number (Z) and Atomic mass (A) (i) Z = 17, A = 35 (ii) Z = 92, A = 233 (iii) Z = 4, A = 9

Answer»

Write the complete symbol for the atom with the given atomic number (Z) and Atomic mass (A)
(i) Z = 17, A = 35

(ii) Z = 92, A = 233

(iii) Z = 4, A = 9

Discussion

11.	Ionic radii of alkali metal ions in water follow the following order
Answer» Ionic radii of alkali metal ions in water follow the following order

Discussion

12.	Toluene on heating with succinic anhydride in the presence of anhydrous AlCl3 followed by reduction with Zn - Hg/Con. HCl gives a product which on heating with thionylchloride followed by heating with anhydrous AICI3 in CS2 gives major product (A), so, the product (A) is:
Answer» Toluene on heating with succinic anhydride in the presence of anhydrous $A l C l_{3}$ followed by reduction with Zn - Hg/Con. HCl gives a product which on heating with thionylchloride followed by heating with anhydrous $A I C I_{3}$ in $C S_{2}$ gives major product (A), so, the product (A) is:

Discussion

13.	Which of the following does not form white ppt with sodium bisulphite?
Answer» Which of the following does not form white ppt with sodium bisulphite?

Discussion

14.	The second order Bragg diffraction of X-rays with l =1.0 A0 froma set of parallel planes in a metal occurs at an angle of 600.The distance between the scattering planes in the crystal is
Answer» The second order Bragg diffraction of X-rays with l =1.0 A⁰froma set of parallel planes in a metal occurs at an angle of 60⁰.The distance between the scattering planes in the crystal is

Discussion

15.	In a fcc lattice, atom A forms the corner points and atom B forms the face centered point. If one atom B is missing from the face centered point, the formula of the ionic compound is
Answer» In a fcc lattice, atom A forms the corner points and atom B forms the face centered point. If one atom B is missing from the face centered point, the formula of the ionic compound is

Discussion

16.	Why toluene is more reactive towards electrophilic substitution
Answer» Why toluene is more reactive towards electrophilic substitution

Discussion

17.	Which of the following compounds would be expected to decarboxylate when heated?
Answer» Which of the following compounds would be expected to decarboxylate when heated?

Discussion

18.	The initial rate of hydrolysis of methyl acetate (1 M) by a weak acid (HA, 1M) is 1100th of that of a strong acid (HX, 1M), at 25∘C. The Ka(HA) is
Answer» The initial rate of hydrolysis of methyl acetate (1 M) by a weak acid (HA, 1M) is $\frac{1}{100^{t h}}$ of that of a strong acid (HX, 1M), at $25^{\circ} C$ . The $K_{a} (H A)$ is

Discussion

19.	The alkene which on ozonolysis yields acetone is
Answer» The alkene which on ozonolysis yields acetone is

Discussion

20.	Find A and B in the given reaction ? CH3−CH2−CH2−COOH+NaOH△−−→CaOA+B
Answer» Find A and B in the given reaction ? $C H_{3} - C H_{2} - C H_{2} - C O O H + N a O H △ - - \to C a O A + B$

Discussion

21.	pH value of a solution, whose hydronium ion concentration is 6.2 × 10−9 mol/l, is
Answer» pH value of a solution, whose hydronium ion concentration is $6.2 \times 10^{- 9}$ mol/l, is

21.

pH value of a solution, whose hydronium ion concentration is 6.2 × 10−9 mol/l, is

Answer»

pH value of a solution, whose hydronium ion concentration is $6.2 \times 10^{- 9}$

mol/l, is

Discussion

22.	Which of the following has not non-zero value of dipole moment?
Answer» Which of the following has not non-zero value of dipole moment?

Discussion

23.	Hydrocarbon containing following bond is most reactive
Answer» Hydrocarbon containing following bond is most reactive

Discussion

24.	The final product formed when ethyl bromide reacts with excess of alcoholic KOH
Answer» The final product formed when ethyl bromide reacts with excess of alcoholic KOH

Discussion

25.	The ionization constant of benzoic acid is 6.46×10−5 and Ksp for silver benzoate is 2.5×10−13. How many times is silver benzoate more soluble in a buffer of pH 3.19 compared to its solubility in pure water?
Answer» The ionization constant of benzoic acid is $6.46 \times 10^{- 5}$ and Ksp for silver benzoate is $2.5 \times 10^{- 13}$ . How many times is silver benzoate more soluble in a buffer of pH 3.19 compared to its solubility in pure water?

Discussion

26.	IUPAC name of CH3(CH2)3CH3 is
Answer» IUPAC name of $C H_{3} (C H_{2})_{3} C H_{3}$ is

Discussion

27.	Which of the following is an anesthetic
Answer» Which of the following is an anesthetic

Discussion

28.	H2O2 turns acidified solution of the following to orange red
Answer» $H_{2} O_{2}$ turns acidified solution of the following to orange red

Discussion

29.	The ratio between radii of He+ ion and H atom is
Answer» The ratio between radii of $H e^{+}$ ion and H atom is

Discussion

30.	[Fe(CN)6]3⊖ has a magnetic moment of 1.73 BM. Thus hybridization of Fe is
Answer» $[F e (C N)_{6}]^{3 ⊖}$ has a magnetic moment of 1.73 BM. Thus hybridization of Fe is

Discussion

31.	If concentration of reactant is increased by m moles, then k (rate constant) becomes:
Answer» If concentration of reactant is increased by m moles, then k (rate constant) becomes:

Discussion

32.	The coordination number and oxidation number of X in the following compound is : [X(SO4)(NH3)5]Cl
Answer» The coordination number and oxidation number of X in the following compound is : $[X (S O_{4}) (N H_{3})_{5}] C l$

Discussion

33.	Octane number is zero for :
Answer» Octane number is zero for :

Discussion

34.	The distance of the closest approach of an alpha particle fired at a nucleus with kinetic energy K1 is ro. The distance of the closest approach when the α – particle is fired at the same nucleus with kinetic energy 2K1 will be.
Answer» The distance of the closest approach of an alpha particle fired at a nucleus with kinetic energy $K_{1}$ is $r_{o}$ . The distance of the closest approach when the α – particle is fired at the same nucleus with kinetic energy $2 K_{1}$ will be.

Discussion

35.	Decomposition temperature of CaCO3 (s) is approximately 900 0C. Which of the following decompose below 900 0C?
Answer» Decomposition temperature of $C a C O_{3}$ (s) is approximately $900^{0} C$ . Which of the following decompose below $900^{0} C$ ?

Discussion

36.	(a) Complete the following equations : (i) Cr2O2−7+2OH−→ (ii) MnO−4+4H++3e−→ (b) Account for the following : (i) Zn is not considered as a transition element. (ii) Transition metals form a large number of complexes. (iii) The E0 value for the Mn3+/Mn2+ couple is much more positive than that for Cr3+/Cr2+ couple.
Answer» (a) Complete the following equations : (i) $C r_{2} O_{7}^{2 -} + 2 O H^{-} \to$ (ii) $M n O_{4}^{-} + 4 H^{+} + 3 e^{-} \to$ (b) Account for the following : (i) Zn is not considered as a transition element. (ii) Transition metals form a large number of complexes. (iii) The $E^{0}$ value for the $M n^{3 +} / M n^{2 +}$ couple is much more positive than that for $C r^{3 +} / C r^{2 +}$ couple.

Discussion

37.	Which of the following is the strongest conjugate base?
Answer» Which of the following is the strongest conjugate base?

Discussion

38.	Suffix and prefix used for -COOH are respectively
Answer» Suffix and prefix used for -COOH are respectively

Discussion

39.	Nylon - 6, 6 is
Answer» Nylon - 6, 6 is

Discussion

40.	Which of the following is a neutral electrophile?
Answer» Which of the following is a neutral electrophile?

Discussion

41.	N02 atoms of X(g) are converted into X+(g) by absorbing E1 energy. 2N0 atoms of X(g) are converted into X−(g) by releasing E2 energy. Calculate the ionisation enthalpy and electron gain enthalpy of X(g) per atom.
Answer» $\frac{N_{0}}{2}$ atoms of $X (g)$ are converted into $X^{+} (g)$ by absorbing $E_{1}$ energy. $2 N_{0}$ atoms of $X (g)$ are converted into $X^{-} (g)$ by releasing $E_{2}$ energy. Calculate the ionisation enthalpy and electron gain enthalpy of $X (g)$ per atom.

Discussion

42.	How many Coulombs of electricity are required for the oxidation of one mol of water to dioxygen?
Answer» How many Coulombs of electricity are required for the oxidation of one mol of water to dioxygen?

Discussion

43.	The students are given a vernier calipers to measure the outer diameter of a cylinder. The actual outer diameter is 4 cm. The measurements made are given in the following table: StudentMeasurements12345A44444B3.53.63.73.83.65C3.73.94.14.34D3.64.24.44.84.25E4.0053.9954.053.954 In case C, the measurements are said to be:
Answer» The students are given a vernier calipers to measure the outer diameter of a cylinder. The actual outer diameter is 4 cm. The measurements made are given in the following table: $\begin{matrix} S t u d e n t & M e a s u r e m e n t s 1 & 2 & 3 & 4 & 5 A & 4 & 4 & 4 & 4 & 4 B & 3.5 & 3.6 & 3.7 & 3.8 & 3.65 C & 3.7 & 3.9 & 4.1 & 4.3 & 4 D & 3.6 & 4.2 & 4.4 & 4.8 & 4.25 E & 4.005 & 3.995 & 4.05 & 3.95 & 4 \end{matrix}$ In case C, the measurements are said to be:

Discussion

44.	The compound that intribits the growth of polymer chain during Vinyl polymerisation, is
Answer» The compound that intribits the growth of polymer chain during Vinyl polymerisation, is

Discussion

45.	The number of hydroxyl group(s) in Q is
Answer» The number of hydroxyl group(s) in Q is

Discussion

46.	The ionisation energy of hydrogen atom is 13.6 eV. What will be the ionisation energy of Li2+ ion?
Answer» The ionisation energy of hydrogen atom is 13.6 eV. What will be the ionisation energy of $L i^{2 +}$ ion?

Discussion

47.	For a complex reaction:
Answer» For a complex reaction:

Discussion

48.	1 g of a metal on treatment with a dilute mineral acid gave 1242 mL of hydrogen at STP. Calculate the equivalent weight of the metal.
Answer» $1 g$ of a metal on treatment with a dilute mineral acid gave $1242 mL$ of hydrogen at STP. Calculate the equivalent weight of the metal.

Discussion

49.	Which one of the following is an example of a positive ion and negative ion that is isoelectronic with F−?
Answer» Which one of the following is an example of a positive ion and negative ion that is isoelectronic with $F^{-}$ ?

Discussion

50.	Markovnikov’s rule: Alkenes undergo electrophilic addition reactions. They are triggered by the acid acting as an electrophile toward the π-electrons of the double bond. Markovnikov’s rule states that when an unsymmetrically substituted alkene reacts with a hydrogen halide, the hydrogen atom adds to the carbon that has a greater number of hydrogens, e.g., What is the energy profile of the given reaction?
Answer» Markovnikov’s rule: Alkenes undergo electrophilic addition reactions. They are triggered by the acid acting as an electrophile toward the π-electrons of the double bond. Markovnikov’s rule states that when an unsymmetrically substituted alkene reacts with a hydrogen halide, the hydrogen atom adds to the carbon that has a greater number of hydrogens, e.g., What is the energy profile of the given reaction?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

The value for Henry’s constant for argon, carbon dioxide, methane and vinyl chloride at 298 K are 40.3 kbar, 1.67 kbar, 0.413 kbar and 0.611 kbar respectively. Which of the gas will be having least solubility?

Oxidation of aldehyde gives:

The reaction R-Br + NaCN R-CN + NaBr is an example of:

Which of the following reagent reacts with aldehyde to give silver mirror test?

Question 17 The electronic configurations of the elements A, B and C are given below. Answer the question on the basis of these configurations. A 1s2 2s2 2p6 B 1s2 2s2 2p6 3s2 3p3 C 1s2 2p6 2p6 3s2 3p5 The bond between B and C will be (a) ionic (b) covalent (c) hydrogen (d) coordinate

The element belonging to group 17 which sublimes is

Mischmetal is an alloy of:

The dissociation energy of H2 is 430.53 kJ mol−1. If hydrogen is dissociated by illumination with radiation of wavelength 253.7 nm, the fraction of the radiant energy which will be converted into kinetic energy is given by

Which one of the following is dibasic acid?

Write the complete symbol for the atom with the given atomic number (Z) and Atomic mass (A) (i) Z = 17, A = 35 (ii) Z = 92, A = 233 (iii) Z = 4, A = 9

Ionic radii of alkali metal ions in water follow the following order

Toluene on heating with succinic anhydride in the presence of anhydrous AlCl3 followed by reduction with Zn - Hg/Con. HCl gives a product which on heating with thionylchloride followed by heating with anhydrous AICI3 in CS2 gives major product (A), so, the product (A) is:

Which of the following does not form white ppt with sodium bisulphite?

The second order Bragg diffraction of X-rays with l =1.0 A0 froma set of parallel planes in a metal occurs at an angle of 600.The distance between the scattering planes in the crystal is

In a fcc lattice, atom A forms the corner points and atom B forms the face centered point. If one atom B is missing from the face centered point, the formula of the ionic compound is

Why toluene is more reactive towards electrophilic substitution

Which of the following compounds would be expected to decarboxylate when heated?

The initial rate of hydrolysis of methyl acetate (1 M) by a weak acid (HA, 1M) is 1100th of that of a strong acid (HX, 1M), at 25∘C. The Ka(HA) is

The alkene which on ozonolysis yields acetone is

Find A and B in the given reaction ? CH3−CH2−CH2−COOH+NaOH△−−→CaOA+B

pH value of a solution, whose hydronium ion concentration is 6.2 × 10−9 mol/l, is

Which of the following has not non-zero value of dipole moment?

Hydrocarbon containing following bond is most reactive

The final product formed when ethyl bromide reacts with excess of alcoholic KOH

The ionization constant of benzoic acid is 6.46×10−5 and Ksp for silver benzoate is 2.5×10−13. How many times is silver benzoate more soluble in a buffer of pH 3.19 compared to its solubility in pure water?

IUPAC name of CH3(CH2)3CH3 is

Which of the following is an anesthetic

H2O2 turns acidified solution of the following to orange red

The ratio between radii of He+ ion and H atom is

[Fe(CN)6]3⊖ has a magnetic moment of 1.73 BM. Thus hybridization of Fe is

If concentration of reactant is increased by m moles, then k (rate constant) becomes:

The coordination number and oxidation number of X in the following compound is : [X(SO4)(NH3)5]Cl

Octane number is zero for :

The distance of the closest approach of an alpha particle fired at a nucleus with kinetic energy K1 is ro. The distance of the closest approach when the α – particle is fired at the same nucleus with kinetic energy 2K1 will be.

Decomposition temperature of CaCO3 (s) is approximately 900 0C. Which of the following decompose below 900 0C?

Which of the following is the strongest conjugate base?

Suffix and prefix used for -COOH are respectively

Nylon - 6, 6 is

Which of the following is a neutral electrophile?

N02 atoms of X(g) are converted into X+(g) by absorbing E1 energy. 2N0 atoms of X(g) are converted into X−(g) by releasing E2 energy. Calculate the ionisation enthalpy and electron gain enthalpy of X(g) per atom.

How many Coulombs of electricity are required for the oxidation of one mol of water to dioxygen?

The compound that intribits the growth of polymer chain during Vinyl polymerisation, is

The number of hydroxyl group(s) in Q is

The ionisation energy of hydrogen atom is 13.6 eV. What will be the ionisation energy of Li2+ ion?

For a complex reaction:

1 g of a metal on treatment with a dilute mineral acid gave 1242 mL of hydrogen at STP. Calculate the equivalent weight of the metal.

Which one of the following is an example of a positive ion and negative ion that is isoelectronic with F−?