46295 + Interview Questions in Chemistry

1.	Which of the following changes requires a reducing agent?
Answer» Which of the following changes requires a reducing agent?

Discussion

2.	Phenol is heated with a solution of a mixture of KBr and KBrO3. The major product obtained in the above reaction is
Answer» Phenol is heated with a solution of a mixture of KBr and KBrO_3. The major product obtained in the above reaction is

Discussion

3.	In the following first-order competing reactions: A+Reagent K1−→ Product B+Reagent K2−→ Product The ratio of K1/K2 if only 50% of B will have been reacted when 94% of A has been reacted in same time is:
Answer» In the following first-order competing reactions: A+Reagent $K_{1} - \to$ Product B+Reagent $K_{2} - \to$ Product The ratio of K₁/K₂ if only 50% of B will have been reacted when 94% of A has been reacted in same time is:

3.

In the following first-order competing reactions: A+Reagent K1−→ Product B+Reagent K2−→ Product The ratio of K1/K2 if only 50% of B will have been reacted when 94% of A has been reacted in same time is:

Answer»

In the following first-order competing reactions:

A+Reagent $K_{1} - \to$ Product

B+Reagent $K_{2} - \to$ Product

The ratio of K₁/K₂ if only 50% of B will have been reacted when 94% of A has been reacted in same time is:

Discussion

4.	Which of the following consists of only one element
Answer» Which of the following consists of only one element

Discussion

5.	With which of the given pairs resembles
Answer» With which of the given pairs resembles

Discussion

6.	The time period of revolution of e− in ground state orbit of hydrogen atom is Tλ, then frequency of e− in second excited state of Li++ ion is
Answer» The time period of revolution of $e^{-}$ in ground state orbit of hydrogen atom is $T_{λ}$ , then frequency of $e^{-}$ in second excited state of $L i^{+ +}$ ion is

Discussion

7.	Among the following compounds which can be dehydrated very easily?
Answer» Among the following compounds which can be dehydrated very easily?

Discussion

8.	Which compound possesses the greatest lattice energy?
Answer» Which compound possesses the greatest lattice energy?

Discussion

9.	Question 7 The oxide that gives H2O2 on treatment with dilute H2SO4 is (a) PbO2 (b) BaO2.8H2O+P2 (c) MnO2 (d) TiO2
Answer» Question 7 The oxide that gives $H_{2} O_{2}$ on treatment with dilute $H_{2} S O_{4}$ is (a) $P b O_{2}$ (b) $B a O_{2} .8 H_{2} O + P_{2}$ (c) $M n O_{2}$ (d) $T i O_{2}$

9.

Question 7 The oxide that gives H2O2 on treatment with dilute H2SO4 is (a) PbO2 (b) BaO2.8H2O+P2 (c) MnO2 (d) TiO2

Answer»

Question 7

The oxide that gives $H_{2} O_{2}$ on treatment with dilute $H_{2} S O_{4}$ is

(a) $P b O_{2}$ (b) $B a O_{2} .8 H_{2} O + P_{2}$

(c) $M n O_{2}$ (d) $T i O_{2}$

Discussion

10.	Consider a cyclic process ACBA consisting of BA → isochoric, AC → isothermal, CB → VT = constant. Working substance is 2 moles of monoatomic ideal gas. If net heat exchange in the process inx R(T2−T1)+y RT2 In V2V1, Find (x + y). ___
Answer» Consider a cyclic process ACBA consisting of BA $\to$ isochoric, AC $\to$ isothermal, CB $\to$ VT = constant. Working substance is 2 moles of monoatomic ideal gas. If net heat exchange in the process in $x R (T_{2} - T_{1}) + y R T_{2} I n \frac{V_{2}}{V_{1}}$ , Find (x + y). ___

Discussion

11.	400 m3 of acetylene is allowed to combust stoichiometrically in air. The volume of gaseous (in m3) products obtained after combustion is . (It is give that air has 20% v/v O2))
Answer» $400 m^{3}$ of acetylene is allowed to combust stoichiometrically in air. The volume of gaseous $(i n m^{3})$ products obtained after combustion is . (It is give that air has 20% v/v $O_{2}$ ))

Discussion

12.	Which of the following is the least feasible for Fischer esterification?
Answer» Which of the following is the least feasible for Fischer esterification?

Discussion

13.	A radioactive material of half-life T was produced in a nuclear reactor at different instants, the quantity produced second time was twice of that produced first time. If now their present activities are A1 and A2 respectively then their age difference equals
Answer» A radioactive material of half-life T was produced in a nuclear reactor at different instants, the quantity produced second time was twice of that produced first time. If now their present activities are $A_{1} a n d A_{2}$ respectively then their age difference equals

Discussion

14.	Two elements X and Y have atomic mass 75 and 16 respectively. They combine to give a compound having 75.8% X. The empirical formula of the compound is:
Answer» Two elements $X$ and $Y$ have atomic mass $75$ and $16$ respectively. They combine to give a compound having $75.8 %$ $X$ . The empirical formula of the compound is:

Discussion

15.	A 100 watt bulb emits monochromatic light of wavelength 400 nm. Calculate the number of photons emitted per second by the bulb.
Answer» A 100 watt bulb emits monochromatic light of wavelength 400 nm. Calculate the number of photons emitted per second by the bulb.

Discussion

16.	When H2SO3 is converted into H2SO4 the change in the oxidation state of sulphur is from:
Answer» When $H_{2} S O_{3}$ is converted into $H_{2} S O_{4}$ the change in the oxidation state of sulphur is from:

Discussion

17.	What is the meaning of colloid
Answer» What is the meaning of colloid

Discussion

18.	Consider a diprotic acid H2A. The dissociation constants for H2A and HA− are 10−6 and 10−13 respectively. Then, the pH of 0.25 M aqueous solution of H2A will be :
Answer» Consider a diprotic acid $H_{2} A$ . The dissociation constants for $H_{2} A$ and $H A^{-}$ are $10^{- 6} a n d 10^{- 13}$ respectively. Then, the pH of $0.25 M$ aqueous solution of $H_{2} A$ will be :

Discussion

19.	Each edge of a cubic unit cell is 400pm long. If atomic weight of the element is 120 and it's density is 6.25 g /cm3 . The crystal lattice is : 1 primitive 2 body centered 3 face centered 4 end centered
Answer» Each edge of a cubic unit cell is 400pm long. If atomic weight of the element is 120 and it's density is 6.25 g /cm3 . The crystal lattice is : 1 primitive 2 body centered 3 face centered 4 end centered

Discussion

20.	Calculate ΔU and ΔH in calories respectively, if one mole of a monoatomic ideal gas is heated at constant pressure of 1 atm from 25oC to 50oC.
Answer» Calculate $Δ U$ and $Δ H$ in calories respectively, if one mole of a monoatomic ideal gas is heated at constant pressure of 1 atm from $25^{o} C$ to $50^{o} C$ .

Discussion

21.	Match each product in LIST-I with one or more reaction in LIST-II and choose the correct option.
Answer» Match each product in LIST-I with one or more reaction in LIST-II and choose the correct option.

Discussion

22.	The statement, "the amount of ozone in the atmosphere is decreased by the chlorofluorocarbon CI2F2C"
Answer» The statement, "the amount of ozone in the atmosphere is decreased by the chlorofluorocarbon CI₂F₂C"

Discussion

23.	Covalent hydrides among CaH2, NH3, NaH and B2H6 are _____
Answer» Covalent hydrides among $C a H_{2}, N H_{3}, N a H a n d B_{2} H_{6}$ are _____

Discussion

24.	When electromagnetic radiation of wavelength 396 ∘A is incident on a metal sheet that has a work function of 15.6 eV, find the maximum kinetic energy of the photoelectrons emitted. Take h=6.6×10−34 Js
Answer» When electromagnetic radiation of wavelength $396 \circ A$ is incident on a metal sheet that has a work function of 15.6 eV, find the maximum kinetic energy of the photoelectrons emitted. Take $h = 6.6 \times 10^{- 34} J s$

Discussion

25.	Which of the following represents the correct chemical structure of Kevlar?
Answer» Which of the following represents the correct chemical structure of Kevlar?

Discussion

26.	In the Zeolite/Permutit ion-exchange method, Na+ ions from the resin are exchanged with
Answer» In the Zeolite/Permutit ion-exchange method, $N a^{+}$ ions from the resin are exchanged with

Discussion

27.	What is the structure and IUPAC name of glycerol?
Answer» What is the structure and IUPAC name of glycerol?

Discussion

28.	If one mole each of a monoatomic and diatomic gases are mixed at low temperature then Cp/Cv ratio for the mixture is :
Answer» If one mole each of a monoatomic and diatomic gases are mixed at low temperature then $C_{p} / C_{v}$ ratio for the mixture is :

Discussion

29.	Calculate the solubility of A2X3 in pure water, assuming that neither kind of ion reacts with water. The solubility product of A2X3, Ksp=1.1×10−23.
Answer» Calculate the solubility of $A_{2} X_{3}$ in pure water, assuming that neither kind of ion reacts with water. The solubility product of $A_{2} X_{3}, K_{s p} = 1.1 \times 10^{- 23} .$

Discussion

30.	Find the number of electrons present in a pure sample of (NH4)2SO4 containing 8 moles of O-atoms?
Answer» Find the number of electrons present in a pure sample of $(N H_{4})_{2} S O_{4}$ containing 8 moles of $O$ -atoms?

Discussion

31.	The composition of air inhaled by a human is 21% O2 by volume and 0.03% CO2 and that of exhaled air is 16% O2 and 4.03% CO2. Assuming a typical volume of 6200 L day−1, moles of O2 used and CO2 generated by the body at 37 ∘C and 1.00 bar are: (Assume ideal behaviour)
Answer» The composition of air inhaled by a human is $21 % O_{2}$ by volume and $0.03 % C O_{2}$ and that of exhaled air is $16 % O_{2}$ and $4.03 % C O_{2}$ . Assuming a typical volume of $6200 {L day}^{- 1}$ , moles of $O_{2}$ used and $C O_{2}$ generated by the body at $37^{\circ} C$ and $1.00 b a r$ are: (Assume ideal behaviour)

Discussion

32.	Two elements A and B combine to form compounds X and Y. For a fixed mass of A, the masses of B that combine to form the compounds X and Y are in the ratio 3:7. If in the compound X, 4g of A combines with 12 g of B, then in compound Y, 8 g of A will combine with _______ g of B.
Answer» Two elements A and B combine to form compounds X and Y. For a fixed mass of A, the masses of B that combine to form the compounds X and Y are in the ratio $3 : 7$ . If in the compound X, $4 g$ of A combines with $12 g$ of B, then in compound Y, $8 g$ of A will combine with _______ $g$ of B.

Discussion

33.	The CFSE for octahedral [CoCl6]4− is 18,000cm–1. The CFSE for tetrahedral [CoCl4]2− will be
Answer» The CFSE for octahedral $[C o C l_{6}]^{4 -}$ is $18, 000 c m^{- 1}$ . The CFSE for tetrahedral $[C o C l_{4}]^{2 -}$ will be

Discussion

34.	Ethyl bromide and bromocyclohexane are treated with ammonia separately with ammonia, the products formed respectively are
Answer» Ethyl bromide and bromocyclohexane are treated with ammonia separately with ammonia, the products formed respectively are

Discussion

35.	The smallest ketone and its next homologue are reacted with hydroxylamine to form oxime.
Answer» The smallest ketone and its next homologue are reacted with hydroxylamine to form oxime.

Discussion

36.	Why is atomic density of K less than Na
Answer» Why is atomic density of K less than Na

Discussion

37.	Which of the following are true for n type semiconductor?
Answer» Which of the following are true for n type semiconductor?

Discussion

38.	Choose the correct stability order of the given free radicals.
Answer» Choose the correct stability order of the given free radicals.

Discussion

39.	Enthalpy of combustion of carbon to CO2 is –393.5 kJ mol−1. Calculate the heat released upon formation of 35.2 g of CO2 from carbon and dioxygen gas.
Answer» Enthalpy of combustion of carbon to $C O_{2}$ is $- 393.5 k J m o l^{- 1}$ . Calculate the heat released upon formation of 35.2 g of $C O_{2}$ from carbon and dioxygen gas.

Discussion

40.	For which of the following reactions, KP=KC ?
Answer» For which of the following reactions, $K_{P} = K_{C}$ ?

Discussion

41.	If NaCl is doped with 10−3 mol of SrCl2, then what is the concentration of cation vacancies?
Answer» If NaCl is doped with $10^{- 3} m o l$ of $S r C l_{2}$ , then what is the concentration of cation vacancies?

Discussion

42.	The de Broglie wavelength of an electron moving in a circular orbit is λ. The minimum radius of orbit is:
Answer» The de Broglie wavelength of an electron moving in a circular orbit is $λ .$ The minimum radius of orbit is:

Discussion

43.	Why is the white ppt. ,Al(OH)3 not soluble in (NH)4OH? i mean ammoium ion should displace silver from its salt right??
Answer» Why is the white ppt. ,Al(OH)3 not soluble in (NH)4OH? i mean ammoium ion should displace silver from its salt right??

Discussion

44.	The outermost electronic configuration of the second most electronegative element is :
Answer» The outermost electronic configuration of the second most electronegative element is :

Discussion

45.	Which of the following cannot exhibit hyperconjugation?
Answer» Which of the following cannot exhibit hyperconjugation?

Discussion

46.	A+2H2O −−−−−→−2HCl (HO−R\|Si\|R−OH HO−R\|Si\|R−OH+HO−R\|Si\|R−OH→ B Identify A and B
Answer» $A + 2 H_{2} O - ---- \to - 2 H C l (H O - R \| S i \| R - O H$ $H O - R \| S i \| R - O H + H O - R \| S i \| R - O H \to B$ Identify A and B

46.

A+2H2O −−−−−→−2HCl (HO−R|Si|R−OH HO−R|Si|R−OH+HO−R|Si|R−OH→ B Identify A and B

Answer»

$A + 2 H_{2} O - ---- \to - 2 H C l (H O - R | S i | R - O H$

$H O - R | S i | R - O H + H O - R | S i | R - O H \to B$

Identify A and B

Discussion

47.	how many structural isomers can be formed of C5H10O
Answer» how many structural isomers can be formed ofC₅H₁₀O

Discussion

48.	Assertion: Be and Al have similar properties. Reason: Be2+ and Al3+ have nearly the same charge/volume ratios and similar polarising power.
Answer» Assertion: Be and Al have similar properties. Reason: $B e^{2 +}$ and $A l^{3 +}$ have nearly the same charge/volume ratios and similar polarising power.

48.

Assertion: Be and Al have similar properties. Reason: Be2+ and Al3+ have nearly the same charge/volume ratios and similar polarising power.

Answer»

Assertion: Be and Al have similar properties.

Reason: $B e^{2 +}$ and $A l^{3 +}$ have nearly the same charge/volume ratios and similar polarising power.

Discussion

49.	The dispersed medium in case of aerosol:
Answer» The dispersed medium in case of aerosol:

Discussion

50.	During the electrolysis of aqueous solution of sodium acetate, the nature of solution left in the vessel and its PH is
Answer» During the electrolysis of aqueous solution of sodium acetate, the nature of solution left in the vessel and its $P^{H}$ is

50.

During the electrolysis of aqueous solution of sodium acetate, the nature of solution left in the vessel and its PH is

Answer»

During the electrolysis of aqueous solution of sodium acetate, the nature of solution left in the vessel and its $P^{H}$ is

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Which of the following changes requires a reducing agent?

Phenol is heated with a solution of a mixture of KBr and KBrO3. The major product obtained in the above reaction is

In the following first-order competing reactions: A+Reagent K1−→ Product B+Reagent K2−→ Product The ratio of K1/K2 if only 50% of B will have been reacted when 94% of A has been reacted in same time is:

Which of the following consists of only one element

With which of the given pairs resembles

The time period of revolution of e− in ground state orbit of hydrogen atom is Tλ, then frequency of e− in second excited state of Li++ ion is

Among the following compounds which can be dehydrated very easily?

Which compound possesses the greatest lattice energy?

Question 7 The oxide that gives H2O2 on treatment with dilute H2SO4 is (a) PbO2 (b) BaO2.8H2O+P2 (c) MnO2 (d) TiO2

Consider a cyclic process ACBA consisting of BA → isochoric, AC → isothermal, CB → VT = constant. Working substance is 2 moles of monoatomic ideal gas. If net heat exchange in the process inx R(T2−T1)+y RT2 In V2V1, Find (x + y). ___

400 m3 of acetylene is allowed to combust stoichiometrically in air. The volume of gaseous (in m3) products obtained after combustion is . (It is give that air has 20% v/v O2))

Which of the following is the least feasible for Fischer esterification?

A radioactive material of half-life T was produced in a nuclear reactor at different instants, the quantity produced second time was twice of that produced first time. If now their present activities are A1 and A2 respectively then their age difference equals

Two elements X and Y have atomic mass 75 and 16 respectively. They combine to give a compound having 75.8% X. The empirical formula of the compound is:

A 100 watt bulb emits monochromatic light of wavelength 400 nm. Calculate the number of photons emitted per second by the bulb.

When H2SO3 is converted into H2SO4 the change in the oxidation state of sulphur is from:

What is the meaning of colloid

Consider a diprotic acid H2A. The dissociation constants for H2A and HA− are 10−6 and 10−13 respectively. Then, the pH of 0.25 M aqueous solution of H2A will be :

Each edge of a cubic unit cell is 400pm long. If atomic weight of the element is 120 and it's density is 6.25 g /cm3 . The crystal lattice is : 1 primitive 2 body centered 3 face centered 4 end centered

Calculate ΔU and ΔH in calories respectively, if one mole of a monoatomic ideal gas is heated at constant pressure of 1 atm from 25oC to 50oC.

Match each product in LIST-I with one or more reaction in LIST-II and choose the correct option.

The statement, "the amount of ozone in the atmosphere is decreased by the chlorofluorocarbon CI2F2C"

Covalent hydrides among CaH2, NH3, NaH and B2H6 are _____

When electromagnetic radiation of wavelength 396 ∘A is incident on a metal sheet that has a work function of 15.6 eV, find the maximum kinetic energy of the photoelectrons emitted. Take h=6.6×10−34 Js

Which of the following represents the correct chemical structure of Kevlar?

In the Zeolite/Permutit ion-exchange method, Na+ ions from the resin are exchanged with

What is the structure and IUPAC name of glycerol?

If one mole each of a monoatomic and diatomic gases are mixed at low temperature then Cp/Cv ratio for the mixture is :

Calculate the solubility of A2X3 in pure water, assuming that neither kind of ion reacts with water. The solubility product of A2X3, Ksp=1.1×10−23.

Find the number of electrons present in a pure sample of (NH4)2SO4 containing 8 moles of O-atoms?

The composition of air inhaled by a human is 21% O2 by volume and 0.03% CO2 and that of exhaled air is 16% O2 and 4.03% CO2. Assuming a typical volume of 6200 L day−1, moles of O2 used and CO2 generated by the body at 37 ∘C and 1.00 bar are: (Assume ideal behaviour)

Two elements A and B combine to form compounds X and Y. For a fixed mass of A, the masses of B that combine to form the compounds X and Y are in the ratio 3:7. If in the compound X, 4g of A combines with 12 g of B, then in compound Y, 8 g of A will combine with _______ g of B.

The CFSE for octahedral [CoCl6]4− is 18,000cm–1. The CFSE for tetrahedral [CoCl4]2− will be

Ethyl bromide and bromocyclohexane are treated with ammonia separately with ammonia, the products formed respectively are

The smallest ketone and its next homologue are reacted with hydroxylamine to form oxime.

Why is atomic density of K less than Na

Which of the following are true for n type semiconductor?

Choose the correct stability order of the given free radicals.

Enthalpy of combustion of carbon to CO2 is –393.5 kJ mol−1. Calculate the heat released upon formation of 35.2 g of CO2 from carbon and dioxygen gas.

For which of the following reactions, KP=KC ?

If NaCl is doped with 10−3 mol of SrCl2, then what is the concentration of cation vacancies?

The de Broglie wavelength of an electron moving in a circular orbit is λ. The minimum radius of orbit is:

Why is the white ppt. ,Al(OH)3 not soluble in (NH)4OH? i mean ammoium ion should displace silver from its salt right??

The outermost electronic configuration of the second most electronegative element is :

Which of the following cannot exhibit hyperconjugation?

A+2H2O −−−−−→−2HCl (HO−R|Si|R−OH HO−R|Si|R−OH+HO−R|Si|R−OH→ B Identify A and B

how many structural isomers can be formed of ​​C5H10O

Assertion: Be and Al have similar properties. Reason: Be2+ and Al3+ have nearly the same charge/volume ratios and similar polarising power.

The dispersed medium in case of aerosol:

During the electrolysis of aqueous solution of sodium acetate, the nature of solution left in the vessel and its PH is

how many structural isomers can be formed of C5H10O