46295 + Interview Questions in Chemistry

1.	A sample of FeSO4 and FeC2O4 is dissolved in H2SO4. The complete oxidation of sample required 8/3 eqv. of KMnO4. After oxidation, the reaction mixture was reduced by Zn. On further oxidation by KMnO4 5/3 eqv were used. The moles of FeC2O4 in the mixture is
Answer» A sample of $F e S O_{4}$ and $F e C_{2} O_{4}$ is dissolved in $H_{2} S O_{4}$ . The complete oxidation of sample required 8/3 eqv. of $K M n O_{4}$ . After oxidation, the reaction mixture was reduced by $Z n$ . On further oxidation by $K M n O_{4}$ 5/3 eqv were used. The moles of $F e C_{2} O_{4}$ in the mixture is

Discussion

2.	In a container two gases He and O2 are mixed with 1 mole of each gas. The average value of CpCv for the mixture will be
Answer» In a container two gases $H e$ and $O_{2}$ are mixed with $1$ mole of each gas. The average value of $\frac{C_{p}}{C_{v}}$ for the mixture will be

Discussion

3.	Which of the following compounds are position isomers?
Answer» Which of the following compounds are position isomers?

Discussion

4.	The freezing point of equimolal aqueous solution will be highest for
Answer» The freezing point of equimolal aqueous solution will be highest for

Discussion

5.	Which of the following is not a pseudo halide?
Answer» Which of the following is not a pseudo halide?

Discussion

6.	(i) Write down the IUPAC name of the following complex: [Co(NH3)5 (NO2)] (NO3)2 (ii) Write the formula for the following complex: Potassium tetracyanidonickelate(II)
Answer» (i) Write down the IUPAC name of the following complex: $[C o (N H_{3})_{5}$ $(N O_{2})]$ $(N O_{3})_{2}$ (ii) Write the formula for the following complex: Potassium tetracyanidonickelate(II)

6.

(i) Write down the IUPAC name of the following complex: [Co(NH3)5 (NO2)] (NO3)2 (ii) Write the formula for the following complex: Potassium tetracyanidonickelate(II)

Answer»

(i) Write down the IUPAC name of the following complex:

$[C o (N H_{3})_{5}$ $(N O_{2})]$ $(N O_{3})_{2}$

(ii) Write the formula for the following complex:

Potassium tetracyanidonickelate(II)

Discussion

7.	At 300 K and 1 atm, 15 mL of a gaseous hydrocarbon requires 375 mL air containing 20% O2 by volume for complete combustion. After combustion the gases occupy 330 mL. Assuming that the water formed is in liquid form and the volumes were measured at the same temperature and pressure, the formula of the hydrocarbon is:
Answer» At 300 K and 1 atm, 15 mL of a gaseous hydrocarbon requires 375 mL air containing 20% $O_{2}$ by volume for complete combustion. After combustion the gases occupy 330 mL. Assuming that the water formed is in liquid form and the volumes were measured at the same temperature and pressure, the formula of the hydrocarbon is:

Discussion

8.	For the octahedral complexes of Fe3+ in SCN−(thiocyanato-S) and in CN− ligand environments, the difference between the spin-only magnetic moment in BM (when approximated to the nearest integer) is [Atomic number of Fe=26]
Answer» For the octahedral complexes of $F e^{3 +}$ in $S C N^{-}$ (thiocyanato-S) and in $C N^{-}$ ligand environments, the difference between the spin-only magnetic moment in BM (when approximated to the nearest integer) is [Atomic number of $F e = 26$ ]

Discussion

9.	1 L of a solution contains 18.9 g of HNO3 and 1 L of another solution contains 3.2 g of NaOH. In what volume ratio must the solutions be mixed to obtain a neutral solution?
Answer» $1 L$ of a solution contains $18.9 g$ of $H N O_{3}$ and $1 L$ of another solution contains $3.2 g$ of $N a O H$ . In what volume ratio must the solutions be mixed to obtain a neutral solution?

Discussion

10.	Equal volumes of three acid solutions of pH 3, 4 and 5 are mixed in a vessel. What will be the H+ concentration in the mixture?
Answer» Equal volumes of three acid solutions of pH 3, 4 and 5 are mixed in a vessel. What will be the $H^{+}$ concentration in the mixture?

Discussion

11.	Ethers on hydrolysis yield
Answer» Ethers on hydrolysis yield

Discussion

12.	Which one of the following is a chiral molecule?
Answer» Which one of the following is a chiral molecule?

Discussion

13.	A chiral C5H10O ether reacts with hot HI to give a C5H10I2 product. Treatment of this with hot KOH in ethanol produces 1, 3-pentadiene. What is the structure of the original ether?
Answer» A chiral $C_{5} H_{10} O$ ether reacts with hot $H I$ to give a $C_{5} H_{10} I_{2}$ product. Treatment of this with hot $K O H$ in ethanol produces 1, 3-pentadiene. What is the structure of the original ether?

Discussion

14.	The correct order of dipole moment is
Answer» The correct order of dipole moment is

14.

The correct order of dipole moment is

Answer»

The correct order of dipole moment is

Discussion

15.	Adsorption of a gas on solid metal surface is spontaneous and exothermic, then:
Answer» Adsorption of a gas on solid metal surface is spontaneous and exothermic, then:

Discussion

16.	CH2=CH−CH2−CH\|Cl−CH3\|CH−CH3CH3O−−−−−→ P (m ajor) The major product is
Answer» $C H_{2} = C H - C H_{2} - C H \| C l - C H_{3} \| C H - C H_{3} C H_{3} O^{-} - --- \to$ P (m ajor) The major product is

Discussion

17.	Total volume of atoms present in fcc unit cell of a metal is (r is atomic radius)
Answer» Total volume of atoms present in fcc unit cell of a metal is (r is atomic radius)

Discussion

18.	What is the number of phases in image A and number of phases in the solution in image B?
Answer» What is the number of phases in image A and number of phases in the solution in image B?

Discussion

19.	Which of the two: O2NCH2CH2O– or CH3CH2O– is expected to be more stable and why?
Answer» Which of the two: O2NCH2CH2O– or CH3CH2O– is expected to be more stable and why?

Discussion

20.	(i) Elements X, Y and Z have 4, 5 and 7 valence electrons respectively. Write the molecular formula of the compounds formed by the elements individually with hydrogen. (ii) Which of these compounds will have highest dipole moment?
Answer» (i) Elements X, Y and Z have 4, 5 and 7 valence electrons respectively. Write the molecular formula of the compounds formed by the elements individually with hydrogen. (ii) Which of these compounds will have highest dipole moment?

20.

(i) Elements X, Y and Z have 4, 5 and 7 valence electrons respectively. Write the molecular formula of the compounds formed by the elements individually with hydrogen. (ii) Which of these compounds will have highest dipole moment?

Answer»

(i)

Elements X, Y and Z have 4, 5 and 7 valence electrons respectively.

Write the molecular formula of the compounds formed by the elements individually with hydrogen.

(ii) Which of these compounds will have highest dipole moment?

Discussion

21.	The correct functional group X and the reagent / reaction conditions Y in the following schemes are
Answer» The correct functional group X and the reagent / reaction conditions Y in the following schemes are

Discussion

22.	In an atom, an electron is moving with a speed of 250 m/s which is measured with an accuracy of 0.001 %. Certainty with which the position of the electron can be located is: (h=6.6×10−34 kg m2 s−1,Mass of electron=9.1×10−31 kg)
Answer» In an atom, an electron is moving with a speed of 250 m/s which is measured with an accuracy of 0.001 %. Certainty with which the position of the electron can be located is: $(h = 6.6 \times 10^{- 34} k g m^{2} s^{- 1}, Mass of electron = 9.1 \times 10^{- 31} k g)$

Discussion

23.	ϵ-caprolactum is the starting material for the manufacture of Nylon-6 and is obtained by the Beckmann rearrangement of:
Answer» $ϵ$ -caprolactum is the starting material for the manufacture of Nylon-6 and is obtained by the Beckmann rearrangement of:

Discussion

24.	Find the square root of −1+2√2i
Answer» Find the square root of $- 1 + 2 \sqrt{2} i$

Discussion

25.	How much must be a 0.02M solution of sodium acetate be diluted at 25∘C in order to double the degree of hydrolysis?
Answer» How much must be a 0.02M solution of sodium acetate be diluted at $25^{\circ} C$ in order to double the degree of hydrolysis?

Discussion

26.	Suppose we carry out the reaction of Iodine on ethylene in presence of UV light such that the obtained product is symmetrical. Which of the following options are accurate?
Answer» Suppose we carry out the reaction of Iodine on ethylene in presence of UV light such that the obtained product is symmetrical. Which of the following options are accurate?

Discussion

27.	At a given temperature, the total vapour pressure (in Torr) of a mixture of volatile components A and B is given by P = 120 - 75 XB hence vapour pressure of pure A and B respectively (in Torr) are -
Answer» At a given temperature, the total vapour pressure (in Torr) of a mixture of volatile components A and B is given by P = 120 - 75 XB hence vapour pressure of pure A and B respectively (in Torr) are -

Discussion

28.	Select the correct statements:
Answer» Select the correct statements:

Discussion

29.	An element of group 14 has an atomic number of 14. Explain whether this element will have metallic properties or non metallic properties. [3 MARKS]
Answer» An element of group 14 has an atomic number of 14. Explain whether this element will have metallic properties or non metallic properties. [3 MARKS]

Discussion

30.	2.5 g of a monobasic acid when dissolved in 100 g of water elevates the boiling point of the solution by 0.256∘C. If 0.5 g of the acid requires 8 milliequivalents of NaOH for complete neutralisation, then the degree of dissociation of the acid is: [Kb of water =0.512Kkgmol−1]
Answer» 2.5 g of a monobasic acid when dissolved in 100 g of water elevates the boiling point of the solution by ${0.256}^{\circ} C$ . If 0.5 g of the acid requires 8 milliequivalents of NaOH for complete neutralisation, then the degree of dissociation of the acid is: [ $K_{b}$ of water $= 0.512 K k g m o l^{- 1}$ ]

Discussion

31.	In the reaction given below, the product formed is
Answer» In the reaction given below, the product formed is

Discussion

32.	Polymerization of glycol with dicarboxylic acids is
Answer» Polymerization of glycol with dicarboxylic acids is

Discussion

33.	What is the approximate value of pH of a 0.2 M solution of ammonia? Given, Kb=1.76×10−5.
Answer» What is the approximate value of $p H$ of a $0.2 M$ solution of ammonia? Given, $K_{b} = 1.76 \times 10^{- 5}$ .

Discussion

34.	For the given reaction: 2CuBr(aq)→CuBr2(aq)+Cu(s) What will be the equivalent mass of CuBr if molecular weight of CuBr is M?
Answer» For the given reaction: $2 C u B r (a q) \to C u B r_{2} (a q) + C u (s)$ What will be the equivalent mass of $C u B r$ if molecular weight of $C u B r$ is $M$ ?

Discussion

35.	One mole of an ideal gas at 500 K is expended isothermally from an initial volume of 1 litre to 10 litre. The ΔE for this process is :
Answer» One mole of an ideal gas at $500 K$ is expended isothermally from an initial volume of $1 litre$ to $10 litre$ . The $Δ E$ for this process is :

Discussion

36.	The major product of the reaction is
Answer» The major product of the reaction is

Discussion

37.	One mole of Helium gas undergoes a reversible cyclic process ABCDA as shown in the figure. Assuming gas to the ideal, answer the following questions: What is the value of ‘q’ for the overall cyclic process?
Answer» One mole of Helium gas undergoes a reversible cyclic process ABCDA as shown in the figure. Assuming gas to the ideal, answer the following questions: What is the value of ‘q’ for the overall cyclic process?

Discussion

38.	Question:- suppose one millikans oil drop contains -4.8 * 10 to the power -19 . How excess electrons are present in one such drop?
Answer» Question:- suppose one millikans oil drop contains -4.8 * 10 to the power -19 . How excess electrons are present in one such drop?

Discussion

39.	The number of atoms present in 4.25 grams of NH3 is approximately
Answer» The number of atoms present in $4.25 g r a m s$ of $N H_{3}$ is approximately

Discussion

40.	Name a substance which can be used as an antiseptic as well as disinfectant.
Answer» Name a substance which can be used as an antiseptic as well as disinfectant.

Discussion

41.	Select the order of the following temperatures for a gas: (A) Boyle’s temperature (B) Critical temperature (C) Inversion temperature
Answer» Select the order of the following temperatures for a gas: (A) Boyle’s temperature (B) Critical temperature (C) Inversion temperature

Discussion

42.	For a cell involving one electron, E0cell = 0.59 V at 298 K, the equilibrium constant for the cell reaction is: [Given that 2.303RTF = 0.059 V at T = 298 K]
Answer» For a cell involving one electron, $E_{c e l l}^{0}$ = 0.59 V at 298 K, the equilibrium constant for the cell reaction is: [Given that $\frac{2.303 R T}{F}$ = 0.059 V at T = 298 K]

Discussion

43.	What is the correct order of increasing second ionisation energies for the elements Be, B, C, N and F?
Answer» What is the correct order of increasing second ionisation energies for the elements $B e, B, C, N$ and $F ?$

Discussion

44.	The rate constant for the first order decomposition of H2O2 is given by the following equation, log k=14.34−1.25×104 K/T. Calculate Ea for this reaction and at what temperature will its half-life period be 256 minutes?
Answer» The rate constant for the first order decomposition of $H_{2} O_{2}$ is given by the following equation, $l o g k = 14.34 - 1.25 \times 10^{4} K / T$ . Calculate $E_{a}$ for this reaction and at what temperature will its half-life period be 256 minutes?

Discussion

45.	Question 2.27 If the solubility product of CuS is 6×10−6, calculate the maximum molarity of CuS in aqueous solution.
Answer» Question 2.27 If the solubility product of CuS is $6 \times 10^{- 6}$ , calculate the maximum molarity of CuS in aqueous solution.

45.

Question 2.27 If the solubility product of CuS is 6×10−6, calculate the maximum molarity of CuS in aqueous solution.

Answer»

Question 2.27

If the solubility product of CuS is $6 \times 10^{- 6}$ , calculate the maximum molarity of CuS in aqueous solution.

Discussion

46.	Among the following, the number of aromatic compound(s) is/are:
Answer» Among the following, the number of aromatic compound(s) is/are:

Discussion

47.	Alkene R−C−H=CH2 reacts readily with B2H6 and the product on oxidation with alkaline hydrogen peroxides produces
Answer» Alkene $R - C - H = C H_{2}$ reacts readily with $B_{2} H_{6}$ and the product on oxidation with alkaline hydrogen peroxides produces

Discussion

48.	C6H5CONHCH3 can be converted into C6H5CH2NHCH3 by
Answer» $C_{6} H_{5} C O N H C H_{3}$ can be converted into $C_{6} H_{5} C H_{2} N H C H_{3}$ by

Discussion

49.	For the reaction, A(g)+2B(g)→2C(g)+3D(g) The value of ΔH at 27 ∘C is 19.0 k cal. The value of ΔE for the reaction would be
Answer» For the reaction, $A (g) + 2 B (g) \to 2 C (g) + 3 D (g)$ The value of $Δ H$ at $27^{\circ} C$ is $19.0 k c a l$ . The value of $Δ E$ for the reaction would be

Discussion

50.	How to measure the covalent radii and the metallic radii?
Answer» How to measure the covalent radii and the metallic radii?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A sample of FeSO4 and FeC2O4 is dissolved in H2SO4. The complete oxidation of sample required 8/3 eqv. of KMnO4. After oxidation, the reaction mixture was reduced by Zn. On further oxidation by KMnO4 5/3 eqv were used. The moles of FeC2O4 in the mixture is

In a container two gases He and O2 are mixed with 1 mole of each gas. The average value of CpCv for the mixture will be

Which of the following compounds are position isomers?

The freezing point of equimolal aqueous solution will be highest for

Which of the following is not a pseudo halide?

(i) Write down the IUPAC name of the following complex: [Co(NH3)5 (NO2)] (NO3)2 (ii) Write the formula for the following complex: Potassium tetracyanidonickelate(II)

For the octahedral complexes of Fe3+ in SCN−(thiocyanato-S) and in CN− ligand environments, the difference between the spin-only magnetic moment in BM (when approximated to the nearest integer) is [Atomic number of Fe=26]

1 L of a solution contains 18.9 g of HNO3 and 1 L of another solution contains 3.2 g of NaOH. In what volume ratio must the solutions be mixed to obtain a neutral solution?

Equal volumes of three acid solutions of pH 3, 4 and 5 are mixed in a vessel. What will be the H+ concentration in the mixture?

Ethers on hydrolysis yield

Which one of the following is a chiral molecule?

A chiral C5H10O ether reacts with hot HI to give a C5H10I2 product. Treatment of this with hot KOH in ethanol produces 1, 3-pentadiene. What is the structure of the original ether?

The correct order of dipole moment is

Adsorption of a gas on solid metal surface is spontaneous and exothermic, then:

CH2=CH−CH2−CH|Cl−CH3|CH−CH3CH3O−−−−−→ P (m ajor) The major product is

Total volume of atoms present in fcc unit cell of a metal is (r is atomic radius)

What is the number of phases in image A and number of phases in the solution in image B?

Which of the two: O2NCH2CH2O– or CH3CH2O– is expected to be more stable and why?

(i) Elements X, Y and Z have 4, 5 and 7 valence electrons respectively. Write the molecular formula of the compounds formed by the elements individually with hydrogen. (ii) Which of these compounds will have highest dipole moment?

The correct functional group X and the reagent / reaction conditions Y in the following schemes are

In an atom, an electron is moving with a speed of 250 m/s which is measured with an accuracy of 0.001 %. Certainty with which the position of the electron can be located is: (h=6.6×10−34 kg m2 s−1,Mass of electron=9.1×10−31 kg)

ϵ-caprolactum is the starting material for the manufacture of Nylon-6 and is obtained by the Beckmann rearrangement of:

Find the square root of −1+2√2i

How much must be a 0.02M solution of sodium acetate be diluted at 25∘C in order to double the degree of hydrolysis?

Suppose we carry out the reaction of Iodine on ethylene in presence of UV light such that the obtained product is symmetrical. Which of the following options are accurate?

At a given temperature, the total vapour pressure (in Torr) of a mixture of volatile components A and B is given by P = 120 - 75 XB hence vapour pressure of pure A and B respectively (in Torr) are -

Select the correct statements:

An element of group 14 has an atomic number of 14. Explain whether this element will have metallic properties or non metallic properties. [3 MARKS]

2.5 g of a monobasic acid when dissolved in 100 g of water elevates the boiling point of the solution by 0.256∘C. If 0.5 g of the acid requires 8 milliequivalents of NaOH for complete neutralisation, then the degree of dissociation of the acid is: [Kb of water =0.512Kkgmol−1]

In the reaction given below, the product formed is

Polymerization of glycol with dicarboxylic acids is

What is the approximate value of pH of a 0.2 M solution of ammonia? Given, Kb=1.76×10−5.

For the given reaction: 2CuBr(aq)→CuBr2(aq)+Cu(s) What will be the equivalent mass of CuBr if molecular weight of CuBr is M?

One mole of an ideal gas at 500 K is expended isothermally from an initial volume of 1 litre to 10 litre. The ΔE for this process is :

The major product of the reaction is

One mole of Helium gas undergoes a reversible cyclic process ABCDA as shown in the figure. Assuming gas to the ideal, answer the following questions: What is the value of ‘q’ for the overall cyclic process?

Question:- suppose one millikans oil drop contains -4.8 * 10 to the power -19 . How excess electrons are present in one such drop?

The number of atoms present in 4.25 grams of NH3 is approximately

Name a substance which can be used as an antiseptic as well as disinfectant.

Select the order of the following temperatures for a gas: (A) Boyle’s temperature (B) Critical temperature (C) Inversion temperature

For a cell involving one electron, E0cell = 0.59 V at 298 K, the equilibrium constant for the cell reaction is: [Given that 2.303RTF = 0.059 V at T = 298 K]

What is the correct order of increasing second ionisation energies for the elements Be, B, C, N and F?

The rate constant for the first order decomposition of H2O2 is given by the following equation, log k=14.34−1.25×104 K/T. Calculate Ea for this reaction and at what temperature will its half-life period be 256 minutes?

Question 2.27 If the solubility product of CuS is 6×10−6, calculate the maximum molarity of CuS in aqueous solution.

Among the following, the number of aromatic compound(s) is/are:

Alkene R−C−H=CH2 reacts readily with B2H6 and the product on oxidation with alkaline hydrogen peroxides produces

C6H5CONHCH3 can be converted into C6H5CH2NHCH3 by

For the reaction, A(g)+2B(g)→2C(g)+3D(g) The value of ΔH at 27 ∘C is 19.0 k cal. The value of ΔE for the reaction would be

How to measure the covalent radii and the metallic radii?