46295 + Interview Questions in Chemistry

1.	Which of the following reduction reaction does not give an amine as product?
Answer» Which of the following reduction reaction does not give an amine as product?

Discussion

2.	Study the following information carefully and answer the questions given below: A, B, C, D, E, F, G and H are sitting around a circle facing at the centre. B is second to the right of H and third to the left of A. D is not an immediate neighbor of either B or H and is second to the right of F. C is fourth to the right of G. Who is fourth to the right of H?
Answer» Study the following information carefully and answer the questions given below: A, B, C, D, E, F, G and H are sitting around a circle facing at the centre. B is second to the right of H and third to the left of A. D is not an immediate neighbor of either B or H and is second to the right of F. C is fourth to the right of G. Who is fourth to the right of H?

Discussion

3.	Two ideal monoatomic and diatomic gases are mixed are mixed at same temperature with one another to form an ideal gas mixture. The equation of the adiabatic process of the mixture is PVγ= constant, where γ=117. If n1 and n2 are the number of moles of the mono atomic and diatomic gases in the mixture respectively, find the ratio n1n2 (Answer upto two digit after decimal point).
Answer» Two ideal monoatomic and diatomic gases are mixed are mixed at same temperature with one another to form an ideal gas mixture. The equation of the adiabatic process of the mixture is $P V^{γ} =$ constant, where $γ = \frac{11}{7} .$ If $n_{1}$ and $n_{2}$ are the number of moles of the mono atomic and diatomic gases in the mixture respectively, find the ratio $\frac{n_{1}}{n_{2}}$ (Answer upto two digit after decimal point).

Discussion

4.	The conductivity of sodium chloride at 298 K has been determined at different concentrations and the results are given below : ConcentrationM0.0010.0100.0200.0500.10010−2×kSm−11.23711.8523.1555.53106.74 Calculate λm for all concentrations and draw a plot between λm and C12 Find the value of λ∘m.
Answer» The conductivity of sodium chloride at 298 K has been determined at different concentrations and the results are given below : $\begin{matrix} \frac{C o n c e n t r a t i o n}{M} & 0.001 & 0.010 & 0.020 & 0.050 & 0.100 10^{- 2} \times \frac{k}{S m^{- 1}} & 1.237 & 11.85 & 23.15 & 55.53 & 106.74 \end{matrix}$ Calculate $λ_{m}$ for all concentrations and draw a plot between $λ_{m}$ and $C^{\frac{1}{2}}$ Find the value of $λ_{m}^{\circ}$ .

4.

The conductivity of sodium chloride at 298 K has been determined at different concentrations and the results are given below : ConcentrationM0.0010.0100.0200.0500.10010−2×kSm−11.23711.8523.1555.53106.74 Calculate λm for all concentrations and draw a plot between λm and C12 Find the value of λ∘m.

Answer»

The conductivity of sodium chloride at 298 K has been determined at different concentrations and the results are given below :

$\begin{matrix} \frac{C o n c e n t r a t i o n}{M} & 0.001 & 0.010 & 0.020 & 0.050 & 0.100 10^{- 2} \times \frac{k}{S m^{- 1}} & 1.237 & 11.85 & 23.15 & 55.53 & 106.74 \end{matrix}$

Calculate $λ_{m}$ for all concentrations and draw a plot between $λ_{m}$ and $C^{\frac{1}{2}}$ Find the value of $λ_{m}^{\circ}$ .

Discussion

5.	Which of the following set of quantum numbers is correct for an electron in 6f orbital?
Answer» Which of the following set of quantum numbers is correct for an electron in 6f orbital?

Discussion

6.	Calculate the electron affinity of oxygen atom in gaining two electrons to give the oxide ion O−2 from the following data. Standard heat of formation of MgO(s)=−600 kJmol−1 Lattice energy of MgO(s)=−3860 kJmol−1 lonization energy of Mg(g) to give Mg+2 is +2170 kJmol−1 Dissociation energy of O2(g) is +494 kJmol−1 Heat of sublimation of Mg(s) is +150 kJmol−1
Answer» Calculate the electron affinity of oxygen atom in gaining two electrons to give the oxide ion $O^{- 2}$ from the following data. Standard heat of formation of $M g O_{(s)} = - 600 k J m o l^{- 1}$ Lattice energy of $M g O_{(s)} = - 3860 k J m o l^{- 1}$ lonization energy of $M g_{(g)}$ to give $M g^{+ 2}$ is +2170 $k J m o l^{- 1}$ Dissociation energy of $O_{2 (g)}$ is +494 $k J m o l^{- 1}$ Heat of sublimation of $M g_{(s)}$ is +150 $k J m o l^{- 1}$

Discussion

7.	Dear mentor please let me know the procedure to upload the images in doubt portal inorder to clear my queries. Thanks!
Answer» Dear mentor please let me know the procedure to upload the images in doubt portal inorder to clear my queries. Thanks!

Discussion

8.	How to find the geometrical isomers of the given compound,and also how many geometrical isomers does the compound have?
Answer» How to find the geometrical isomers of the given compound,and also how many geometrical isomers does the compound have?

Discussion

9.	Arrange in the order of decreasing pKb .
Answer» Arrange in the order of decreasing $p K_{b}$ .

9.

Arrange in the order of decreasing pKb .

Answer»

Arrange in the order of decreasing $p K_{b}$

.

Discussion

10.	Consider the ground state of Cr atom (X =24). The number of electrons with the azimuthal quantum numbers, I = 1 and 2 are, respectively
Answer» Consider the ground state of Cr atom (X =24). The number of electrons with the azimuthal quantum numbers, I = 1 and 2 are, respectively

Discussion

11.	Why the expansion of octet occurs in some elements?
Answer» Why the expansion of octet occurs in some elements?

Discussion

12.	What volume of 29.2% w/w HCl solution of density 1.25 g/ml is required to prepare 200 ml of 0.4 M HCl solution.
Answer» What volume of 29.2% w/w HCl solution of density 1.25 g/ml is required to prepare 200 ml of 0.4 M HCl solution.

Discussion

13.	Camphor is used as solvent to determine the molecular mass of non-volatile solute by Rast method because for camphor
Answer» Camphor is used as solvent to determine the molecular mass of non-volatile solute by Rast method because for camphor

Discussion

14.	Pickles have a long shelf life and do not get spoiled for months, why?
Answer» Pickles have a long shelf life and do not get spoiled for months, why?

Discussion

15.	Why the value of R is 2 calories here? Question: Heat of reaction for C6H12O6(s) + 6O2 → 6CO2(g) + 6H2O(v)at constant pressure is −651 K cal at 17∘ C. What is the heat of reaction at constant volume at 17∘ C? Chemistry Chemical Thermodynamics Thermochemistry Solution: We know that Δ H = Δ U + Δ nRT Given Δ H = −651 × 103cal; R = 2 calorie T = 290K; Δ n = 6 + 6 − 6 = 6 ∴ −651 × 103 = Δ U + 6 × 2 × 290 Δ U = −654.48 kcal
Answer» Why the value of R is 2 calories here? Question: Heat of reaction for C6H12O6(s) + 6O2 → 6CO2(g) + 6H2O(v)at constant pressure is −651 K cal at 17∘ C. What is the heat of reaction at constant volume at 17∘ C? Chemistry Chemical Thermodynamics Thermochemistry Solution: We know that Δ H = Δ U + Δ nRT Given Δ H = −651 × 103cal; R = 2 calorie T = 290K; Δ n = 6 + 6 − 6 = 6 ∴ −651 × 103 = Δ U + 6 × 2 × 290 Δ U = −654.48 kcal

15.

Why the value of R is 2 calories here? Question: Heat of reaction for C6H12O6(s) + 6O2 → 6CO2(g) + 6H2O(v)at constant pressure is −651 K cal at 17∘ C. What is the heat of reaction at constant volume at 17∘ C? Chemistry Chemical Thermodynamics Thermochemistry Solution: We know that Δ H = Δ U + Δ nRT Given Δ H = −651 × 103cal; R = 2 calorie T = 290K; Δ n = 6 + 6 − 6 = 6 ∴ −651 × 103 = Δ U + 6 × 2 × 290 Δ U = −654.48 kcal

Answer»

Why the value of R is 2 calories here?

Question:

Heat of reaction for C6H12O6(s) + 6O2 → 6CO2(g) + 6H2O(v)at constant pressure is −651 K cal at 17∘ C. What is the heat of reaction at constant volume at 17∘ C?

Chemistry Chemical Thermodynamics Thermochemistry

Solution:

We know that Δ H = Δ U + Δ nRT

Given Δ H = −651 × 103cal; R = 2 calorie

T = 290K; Δ n = 6 + 6 − 6 = 6

∴ −651 × 103 = Δ U + 6 × 2 × 290

Δ U = −654.48 kcal

Discussion

16.	Rearrange the following compounds in the increasing order of their boiling points : CH3−CHO, CH3−CH2−OH, CH3−CH2−CH3
Answer» Rearrange the following compounds in the increasing order of their boiling points : $C H_{3} - C H O, C H_{3} - C H_{2} - O H, C H_{3} - C H_{2} - C H_{3}$

Discussion

17.	Which of the following has highest priority based on atomic number. CH2OH. (or) . C(CH3)3 CH2-CH2-OH. (or) CH(CH3)2
Answer» Which of the following has highest priority based on atomic number. CH2OH. (or) . C(CH3)3 CH2-CH2-OH. (or) CH(CH3)2

Discussion

18.	The osmotic pressure of one molar solution at 0oC is
Answer» The osmotic pressure of one molar solution at 0^oC is

Discussion

19.	Which of the following is true for an isothermal process?
Answer» Which of the following is true for an isothermal process?

Discussion

20.	In which of the following structures the pair of starred carbon atom do not lie in the same plane
Answer» In which of the following structures the pair of starred carbon atom do not lie in the same plane

Discussion

21.	A mixture of two amino acids having pl 9.60 and 5.40 can be separated
Answer» A mixture of two amino acids having pl 9.60 and 5.40 can be separated

Discussion

22.	Quarternary ammonium salts of amines with acetates, chlorides and bromides as substrates are known as:
Answer» Quarternary ammonium salts of amines with acetates, chlorides and bromides as substrates are known as:

Discussion

23.	What is the role of flux in metallurgical processes?
Answer» What is the role of flux in metallurgical processes?

Discussion

24.	Write the chemical equation to convert salicylic acid to aspirin.
Answer» Write the chemical equation to convert salicylic acid to aspirin.

Discussion

25.	Distinguish between propene and propyne.
Answer» Distinguish between propene and propyne.

Discussion

26.	1- What is coherent surface ?
Answer» 1- What is coherent surface ?

Discussion

27.	Acetadehyde reacts with thionyl chloride to give (the main product)
Answer» Acetadehyde reacts with thionyl chloride to give (the main product)

Discussion

28.	Which of the following is not a synthetic polymer?
Answer» Which of the following is not a synthetic polymer?

Discussion

29.	A black, water insoluble powder (A) liberates yellowish green gas (B) on treatment with conc. HCl and (A) dissolves to give a clear solution. Solid (A) when heated with PbO2 and HNO3 (or) sodium bismuthate & H2SO4 gives a purple solution (C). The purple solution is due to the formation of
Answer» A black, water insoluble powder (A) liberates yellowish green gas (B) on treatment with conc. HCl and (A) dissolves to give a clear solution. Solid (A) when heated with $P b O_{2}$ and $H N O_{3}$ (or) sodium bismuthate & $H_{2} S O_{4}$ gives a purple solution (C). The purple solution is due to the formation of

Discussion

30.	The H – O – H bond angle in water is –
Answer» The H – O – H bond angle in water is –

Discussion

31.	In CO2, I−3, NO−2 and NO+2, if the sum of bond pairs (single bond) on the central atom of all the molecules given is x and the sum of all lone pairs on the central atom of all the molecules given is y then, (x+y) is:
Answer» In $C O_{2}$ , $I_{3}^{-}$ , $N O_{2}^{-}$ and $N O_{2}^{+}$ , if the sum of bond pairs (single bond) on the central atom of all the molecules given is $x$ and the sum of all lone pairs on the central atom of all the molecules given is $y$ then, $(x + y)$ is:

Discussion

32.	Write the names and structures of the monomers of the following polymers: (i) Nylon-6 (ii) Novolac (iii) Buna-N
Answer» Write the names and structures of the monomers of the following polymers: (i) Nylon-6 (ii) Novolac (iii) Buna-N

32.

Write the names and structures of the monomers of the following polymers: (i) Nylon-6 (ii) Novolac (iii) Buna-N

Answer»

Write the names and structures of the monomers of the following polymers:

(i) Nylon-6

(ii) Novolac

(iii) Buna-N

Discussion

33.	In which of the following hydride law of constant composition does not hold good.
Answer» In which of the following hydride law of constant composition does not hold good.

Discussion

34.	Which of the following alcohols is most reactive with HCI in the presence of ZnCl2?
Answer» Which of the following alcohols is most reactive with HCI in the presence of $Z n C l_{2}$ ?

Discussion

35.	Which of the following does not show optical isomerism?
Answer» Which of the following does not show optical isomerism?

Discussion

36.	Question 10 The unit of ebuilioscopic constant is (a) K kg mol−1 or K (molality)−1 (b) mol kg K−1 or K−1 (molality) (c) kg mol−1 or K−1 (molality)−1 (d) K mol kg−1 or (molality)
Answer» Question 10 The unit of ebuilioscopic constant is (a) $K k g m o l^{- 1} o r K (m o l a l i t y)^{- 1}$ (b) $m o l k g K^{- 1} o r K^{- 1} (m o l a l i t y)$ (c) $k g m o l^{- 1} o r K^{- 1} (m o l a l i t y)^{- 1}$ (d) $K m o l k g^{- 1} o r (m o l a l i t y)$

Discussion

37.	Which is more polar.... alkane alkene or alkyne and why??
Answer» Which is more polar.... alkane alkene or alkyne and why??

Discussion

38.	What would happen when solution of potassium chromate is treated with the excess of nitric acid?
Answer» What would happen when solution of potassium chromate is treated with the excess of nitric acid?

Discussion

39.	Write the equation of the reaction of hydrogen iodide with: I-propoxypropane Methoxybenzene Benzyl ethyl ether
Answer» Write the equation of the reaction of hydrogen iodide with: I-propoxypropane Methoxybenzene Benzyl ethyl ether

39.

Write the equation of the reaction of hydrogen iodide with: I-propoxypropane Methoxybenzene Benzyl ethyl ether

Answer»

Write the equation of the reaction of hydrogen iodide with:

I-propoxypropane

Methoxybenzene

Benzyl ethyl ether

Discussion

40.	What is the realationship between the two terminal groups in a cumulene containing three consecutive double bonds?(H2C=C=C=CH2)
Answer» What is the realationship between the two terminal groups in a cumulene containing three consecutive double bonds? $(H_{2} C = C = C = C H_{2})$

Discussion

41.	Find the relative formula mass of CaSO4?
Answer» Find the relative formula mass of $C a S O_{4}$ ?

Discussion

42.	The most unlikely representation of resonance structures of p-nitrophenoxide ion is:
Answer» The most unlikely representation of resonance structures of p-nitrophenoxide ion is:

Discussion

43.	The velocity of an electron placed in 3rd orbit of H atom, will be
Answer» The velocity of an electron placed in 3^rd orbit of H atom, will be

Discussion

44.	Which of the following is insoluble in excess NaOH?
Answer» Which of the following is insoluble in excess NaOH?

Discussion

45.	What happens when the bond formed between an enzyme and an inhibitor is a strong covalent bond?
Answer» What happens when the bond formed between an enzyme and an inhibitor is a strong covalent bond?

Discussion

46.	In which of the following geometrical isomerism is not possible.
Answer» In which of the following geometrical isomerism is not possible.

46.

In which of the following geometrical isomerism is not possible.

Answer»

In which of the following geometrical isomerism is not possible.

Discussion

47.	Which of the following has the maximum solubility in water?
Answer» Which of the following has the maximum solubility in water?

Discussion

48.	What is the sum of the lowest oxidation states of sulphur in the following species: S4O2−6,S2O2−3,S2O2−8,S2O2−7
Answer» What is the sum of the lowest oxidation states of sulphur in the following species: $S_{4} O_{6}^{2 -}, S_{2} O_{3}^{2 -}, S_{2} O_{8}^{2 -}, S_{2} O_{7}^{2 -}$

Discussion

49.	The free energy change when 1 mole of NaCl is dissolved in water at 25oC is −x kJ mol−1 Lattice energy of NaCl = 777.8 kJ mol−1; △S for dissolution =0.043 kJ mol−1 and hydration energy of NaCl=−774.1 kJ mol−1. Value of x (rounded off to nearest integer) is
Answer» The free energy change when 1 mole of NaCl is dissolved in water at $25^{o} C$ is $- x k J m o l^{- 1}$ Lattice energy of NaCl = $777.8 k J m o l^{- 1}$ ; $△ S$ for dissolution $= 0.043 k J m o l^{- 1}$ and hydration energy of $N a C l = - 774.1 k J m o l^{- 1} .$ Value of x (rounded off to nearest integer) is

Discussion

50.	Which of the following reaction will give diastereomers as the product(s)?
Answer» Which of the following reaction will give diastereomers as the product(s)?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following reduction reaction does not give an amine as product?

Which of the following set of quantum numbers is correct for an electron in 6f orbital?

Dear mentor please let me know the procedure to upload the images in doubt portal inorder to clear my queries. Thanks!

How to find the geometrical isomers of the given compound,and also how many geometrical isomers does the compound have?

Arrange in the order of decreasing pKb .

Consider the ground state of Cr atom (X =24). The number of electrons with the azimuthal quantum numbers, I = 1 and 2 are, respectively

Why the expansion of octet occurs in some elements?

What volume of 29.2% w/w HCl solution of density 1.25 g/ml is required to prepare 200 ml of 0.4 M HCl solution.

Camphor is used as solvent to determine the molecular mass of non-volatile solute by Rast method because for camphor

Pickles have a long shelf life and do not get spoiled for months, why?

Rearrange the following compounds in the increasing order of their boiling points : CH3−CHO, CH3−CH2−OH, CH3−CH2−CH3

Which of the following has highest priority based on atomic number. CH2OH. (or) . C(CH3)3 CH2-CH2-OH. (or) CH(CH3)2

The osmotic pressure of one molar solution at 0oC is

Which of the following is true for an isothermal process?

In which of the following structures the pair of starred carbon atom do not lie in the same plane

A mixture of two amino acids having pl 9.60 and 5.40 can be separated

Quarternary ammonium salts of amines with acetates, chlorides and bromides as substrates are known as:

What is the role of flux in metallurgical processes?

Write the chemical equation to convert salicylic acid to aspirin.

Distinguish between propene and propyne.

1- What is coherent surface ?

Acetadehyde reacts with thionyl chloride to give (the main product)

Which of the following is not a synthetic polymer?

A black, water insoluble powder (A) liberates yellowish green gas (B) on treatment with conc. HCl and (A) dissolves to give a clear solution. Solid (A) when heated with PbO2 and HNO3 (or) sodium bismuthate &amp; H2SO4 gives a purple solution (C). The purple solution is due to the formation of

The H – O – H bond angle in water is –

In CO2, I−3, NO−2 and NO+2, if the sum of bond pairs (single bond) on the central atom of all the molecules given is x and the sum of all lone pairs on the central atom of all the molecules given is y then, (x+y) is:

Write the names and structures of the monomers of the following polymers: (i) Nylon-6 (ii) Novolac (iii) Buna-N

In which of the following hydride law of constant composition does not hold good.

Which of the following alcohols is most reactive with HCI in the presence of ZnCl2?

Which of the following does not show optical isomerism?

Question 10 The unit of ebuilioscopic constant is (a) K kg mol−1 or K (molality)−1 (b) mol kg K−1 or K−1 (molality) (c) kg mol−1 or K−1 (molality)−1 (d) K mol kg−1 or (molality)

Which is more polar.... alkane alkene or alkyne and why??

What would happen when solution of potassium chromate is treated with the excess of nitric acid?

Write the equation of the reaction of hydrogen iodide with: I-propoxypropane Methoxybenzene Benzyl ethyl ether

What is the realationship between the two terminal groups in a cumulene containing three consecutive double bonds?(H2C=C=C=CH2)

Find the relative formula mass of CaSO4?

The most unlikely representation of resonance structures of p-nitrophenoxide ion is:

The velocity of an electron placed in 3rd orbit of H atom, will be

Which of the following is insoluble in excess NaOH?

What happens when the bond formed between an enzyme and an inhibitor is a strong covalent bond?

In which of the following geometrical isomerism is not possible.

Which of the following has the maximum solubility in water?

What is the sum of the lowest oxidation states of sulphur in the following species: S4O2−6,S2O2−3,S2O2−8,S2O2−7

The free energy change when 1 mole of NaCl is dissolved in water at 25oC is −x kJ mol−1 Lattice energy of NaCl = 777.8 kJ mol−1; △S for dissolution =0.043 kJ mol−1 and hydration energy of NaCl=−774.1 kJ mol−1. Value of x (rounded off to nearest integer) is

Which of the following reaction will give diastereomers as the product(s)?

A black, water insoluble powder (A) liberates yellowish green gas (B) on treatment with conc. HCl and (A) dissolves to give a clear solution. Solid (A) when heated with PbO2 and HNO3 (or) sodium bismuthate & H2SO4 gives a purple solution (C). The purple solution is due to the formation of