46295 + Interview Questions in Chemistry

1.	Why is N2 less reactive at room temperature?
Answer» Why is N₂ less reactive at room temperature?

Discussion

2.	A primary alkyl halide would prefer to undergo.......... (a) SN1 reaction (b) SN2 reaction (c) α− elimination (d) racemisation
Answer» A primary alkyl halide would prefer to undergo.......... (a) $S_{N} 1$ reaction (b) $S_{N} 2$ reaction (c) $α -$ elimination (d) racemisation

2.

A primary alkyl halide would prefer to undergo.......... (a) SN1 reaction (b) SN2 reaction (c) α− elimination (d) racemisation

Answer»

A primary alkyl halide would prefer to undergo..........

(a) $S_{N} 1$ reaction (b) $S_{N} 2$ reaction (c) $α -$ elimination (d) racemisation

Discussion

3.	air contains 70% of nitrogen and 30% of oxygen by moles find average molar mass
Answer» air contains 70% of nitrogen and 30% of oxygen by moles find average molar mass

Discussion

4.	How many optically active stereoisomers are possible for butane-2,3-diol?
Answer» How many optically active stereoisomers are possible for butane-2,3-diol?

Discussion

5.	For which of the following concentrations , the sparingly soluble salt CaCO3 will not precipitate at 25∘C Given, Ksp(CaCO3)=3.8×10−9
Answer» For which of the following concentrations , the sparingly soluble salt $C a C O_{3}$ will not precipitate at $25^{\circ} C$ Given, $K_{s p} (C a C O_{3}) = 3.8 \times 10^{- 9}$

Discussion

6.	23. The product obtain when the chlorine gas react with cold and dilute aq.NaoH are 1. Cl & clo2 2. Clo & col3 3. Clo2 & clo3 4. Cl & clo
Answer» 23. The product obtain when the chlorine gas react with cold and dilute aq.NaoH are 1. Cl & clo2 2. Clo & col3 3. Clo2 & clo3 4. Cl & clo

Discussion

7.	In the reaction scheme shown below, Q, R, and S are the major products.The correct structure of:
Answer» In the reaction scheme shown below, Q, R, and S are the major products. The correct structure of:

7.

In the reaction scheme shown below, Q, R, and S are the major products.The correct structure of:

Answer»

In the reaction scheme shown below, Q, R, and S are the major products.

The correct structure of:

Discussion

8.	Which of the following is not hygroscopic 1) NaCl 2) MgCl2 3) CaCl2 4) LiCl
Answer» Which of the following is not hygroscopic 1) NaCl 2) MgCl2 3) CaCl2 4) LiCl

Discussion

9.	The correct statement(s) about surface properties is (are)
Answer» The correct statement(s) about surface properties is (are)

Discussion

10.	Why does an object take same time to go up and come down? Although they travel same distance but the force of attraction should be large when it comes down, so logically it should take comparatively less time to come down than to go up (Neglect air resistance)
Answer» Why does an object take same time to go up and come down? Although they travel same distance but the force of attraction should be large when it comes down, so logically it should take comparatively less time to come down than to go up (Neglect air resistance)

Discussion

11.	In the following reactions, The major products (A) and (C) are respectively:
Answer» In the following reactions, The major products (A) and (C) are respectively:

Discussion

12.	In the photoelectric effect, the strength of the photoelectric current is proportional to
Answer» In the photoelectric effect, the strength of the photoelectric current is proportional to

Discussion

13.	Which among the following gases has highest critical temperature 1)H2 2)O2 3)Co2 4)NH3
Answer» Which among the following gases has highest critical temperature 1)H2 2)O2 3)Co2 4)NH3

Discussion

14.	How many mole of lead chloride will be formed from a reaction between 6.5 grams of PbO and 3.2 grams of HCl ?
Answer» How many mole of lead chloride will be formed from a reaction between 6.5 grams of PbO and 3.2 grams of HCl ?

Discussion

15.	What is the hydrolysis constant of a weak acid-weak base?
Answer» What is the hydrolysis constant of a weak acid-weak base?

Discussion

16.	Quantify the total charge present in 3.5 moles of phosphate ion in Faraday unit.
Answer» Quantify the total charge present in 3.5 moles of phosphate ion in Faraday unit.

Discussion

17.	Which step is the rate determining step in esterification reaction? How to predict rds in such reactions?
Answer» Which step is the rate determining step in esterification reaction? How to predict rds in such reactions?

Discussion

18.	As per IUPAC nomenclature, sodium nitroprusside is also called
Answer» As per IUPAC nomenclature, sodium nitroprusside is also called

Discussion

19.	Mole fraction of solute in aqueous solution of 30% NaOH.
Answer» Mole fraction of solute in aqueous solution of 30% NaOH.

Discussion

20.	Burst the bubbles that contain an Arrhenius base.
Answer» Burst the bubbles that contain an Arrhenius base.

Discussion

21.	The reaction of benzyl chloride with sodium cyanide followed by reduction with hydrogen in the presence of nickel give
Answer» The reaction of benzyl chloride with sodium cyanide followed by reduction with hydrogen in the presence of nickel give

Discussion

22.	Writethe names of reagents and equations for the preparation of thefollowing ethers by Williamson’s synthesis:(i) 1-Propoxypropane(ii) Ethoxybenzene(iii) 2-Methoxy-2-methylpropane (iv) 1-Methoxyethane
Answer» Write the names of reagents and equations for the preparation of the following ethers by Williamson’s synthesis: (i) 1-Propoxypropane (ii) Ethoxybenzene (iii) 2-Methoxy-2-methylpropane (iv) 1-Methoxyethane

22.

Writethe names of reagents and equations for the preparation of thefollowing ethers by Williamson’s synthesis:(i) 1-Propoxypropane(ii) Ethoxybenzene(iii) 2-Methoxy-2-methylpropane (iv) 1-Methoxyethane

Answer»

Write
the names of reagents and equations for the preparation of the
following ethers by Williamson’s synthesis:

(i)
1-Propoxypropane

(ii)
Ethoxybenzene

(iii)
2-Methoxy-2-methylpropane

(iv)
1-Methoxyethane

Discussion

23.	The correct order of reactivity of PhMgBr with following compounds will be: (1).(C6H5)2CO, (2).CH3−CH=O, (3).(CH3)2C=O
Answer» The correct order of reactivity of $P h M g B r$ with following compounds will be: $(1) . (C_{6} H_{5})_{2} C O, (2) . C H_{3} - C H = O, (3) . (C H_{3})_{2} C = O$

Discussion

24.	Hello sir/ma'am My doubt is that for an isothermal reversible process why should ∆H = 0? Shouldn't it have some other value because there is a change in volume?( ∆H=∆U+P∆V, ∆U=0 )
Answer» Hello sir/ma'am My doubt is that for an isothermal reversible process why should ∆H = 0? Shouldn't it have some other value because there is a change in volume?( ∆H=∆U+P∆V, ∆U=0 )

Discussion

25.	Name the type of bond formed by :-1 Px+Px orbital on y or z internuclear axis2Py+Py orbital on x or z internuclear axis3 Pz+Pz orbital on x or y internuclear axis
Answer» Name the type of bond formed by :- 1 Px+Px orbital on y or z internuclear axis 2Py+Py orbital on x or z internuclear axis 3 Pz+Pz orbital on x or y internuclear axis

Discussion

26.	A solution is 0.1 M in each KCl, KBr and K2 CrO4 to this solution solid AgNO3 is gradually added. Assume there is no change in the volume of the solution given: Ksp (AgCl) = 1.7×10−10 Ksp (AgBr) = 5.0×10−13 and Ksp (K2CrO4)=1.9×10−12 The concentration of [Ag+] required to start the precipitation of AgBr is:
Answer» A solution is 0.1 M in each KCl, KBr and $K _{2} C r O_{4}$ to this solution solid $A g N O_{3}$ is gradually added. Assume there is no change in the volume of the solution given: Ksp (AgCl) = $1.7 \times 10^{- 10}$ Ksp (AgBr) = $5.0 \times 10^{- 13}$ and Ksp $(K_{2} C r O_{4}) = 1.9 \times 10^{- 12}$ The concentration of $[A g^{+}]$ required to start the precipitation of AgBr is:

Discussion

27.	Isopropyl alcohol on treatment with an excess of conc.H2SO4 gives 'X' which on treatment with HBr gives 'Y'. When 'Y' is dissolved in ether and treated with sodium gives 'Z'. Calculate the molecular weight of 'Z'.
Answer» Isopropyl alcohol on treatment with an excess of $c o n c . H_{2} S O_{4}$ gives 'X' which on treatment with $H B r$ gives 'Y'. When 'Y' is dissolved in ether and treated with sodium gives 'Z'. Calculate the molecular weight of 'Z'.

Discussion

28.	Suggest a reagent for conversion of ethanol to ethanal.
Answer» Suggest a reagent for conversion of ethanol to ethanal.

Discussion

29.	Which has maximum bond energy? a)Cl2 b)Br2 c)F2 d)I2
Answer» Which has maximum bond energy? a)Cl₂b)Br₂ c)F₂d)I₂

29.

Which has maximum bond energy? a)Cl2 b)Br2 c)F2 d)I2

Answer»

Which has maximum bond energy?

a)Cl₂b)Br₂ c)F₂d)I₂

Discussion

30.	11. Alcohol reacts with Grignard Reagant to form (a)Alkanes (b)Alkenes (c)Alkynes (d)All of them
Answer» 11. Alcohol reacts with Grignard Reagant to form (a)Alkanes (b)Alkenes (c)Alkynes (d)All of them

Discussion

31.	In which of the following ionisation processes has the bond order increased and the magnetic behaviour changed?
Answer» In which of the following ionisation processes has the bond order increased and the magnetic behaviour changed?

Discussion

32.	Arrange the following set of compounds in order of their decreasing relative reactivity with an electrophile, E+ (a)Chlorobenzene, 2,4-dinitrochlorobenzene, p-nitrochlorobenzene (b)Toluene, p−H3C−C6H4−NO2,p−O2N−C6H4−NO2.
Answer» Arrange the following set of compounds in order of their decreasing relative reactivity with an electrophile, $E^{+}$ (a)Chlorobenzene, 2,4-dinitrochlorobenzene, p-nitrochlorobenzene (b)Toluene, $p - H_{3} C - C_{6} H_{4} - N O_{2}, p - O_{2} N - C_{6} H_{4} - N O_{2} .$

32.

Arrange the following set of compounds in order of their decreasing relative reactivity with an electrophile, E+ (a)Chlorobenzene, 2,4-dinitrochlorobenzene, p-nitrochlorobenzene (b)Toluene, p−H3C−C6H4−NO2,p−O2N−C6H4−NO2.

Answer»

Arrange the following set of compounds in order of their decreasing relative reactivity with an electrophile, $E^{+}$
(a)Chlorobenzene, 2,4-dinitrochlorobenzene, p-nitrochlorobenzene

(b)Toluene, $p - H_{3} C - C_{6} H_{4} - N O_{2}, p - O_{2} N - C_{6} H_{4} - N O_{2} .$

Discussion

33.	0.1 M CH3COOH is titrated with 0.1 M NaOH solution. What would be the difference in pH between 14th and34th stages of neutralization of the acid?
Answer» $0.1 M C H_{3} C O O H$ is titrated with $0.1 M N a O H$ solution. What would be the difference in pH between $\frac{1}{4^{t h}} and \frac{3}{4^{t h}}$ stages of neutralization of the acid?

Discussion

34.	What will be the concentration of H+ in a solution if potential of hydrogen electrode is -118.2mV? (Partial pressure of H2 is 1 atm)
Answer» What will be the concentration of H+ in a solution if potential of hydrogen electrode is -118.2mV? (Partial pressure of H2 is 1 atm)

Discussion

35.	11.What is the correct order of increasing second ionisation energy in Lithium,Berilium,Boron and Carbon?
Answer» 11.What is the correct order of increasing second ionisation energy in Lithium,Berilium,Boron and Carbon?

Discussion

36.	A bottle of dry ammonia and a dry bottle of HCL connected through a long tube are opened simul†an eously at both ends , the white ammonium chloride ring first formed will be 1)at the centre of the tube 2)near the HCL bottle 3) near the ammonia bottle 4)throughout the length of the tube
Answer» A bottle of dry ammonia and a dry bottle of HCL connected through a long tube are opened simul†an eously at both ends , the white ammonium chloride ring first formed will be 1)at the centre of the tube 2)near the HCL bottle 3) near the ammonia bottle 4)throughout the length of the tube

Discussion

37.	why we don't cancel out molecular mass and valency if they have a common factor in equivalent mass ?
Answer» why we don't cancel out molecular mass and valency if they have a common factor in equivalent mass ?

Discussion

38.	Find out the correct order of basic strength among the given compounds.
Answer» Find out the correct order of basic strength among the given compounds.

Discussion

39.	Which one of the following will be reactive for Perkin condensation ?
Answer» Which one of the following will be reactive for Perkin condensation ?

Discussion

40.	Question 41In electron dot structure, the valence shell electrons are represented by crosses or dots(a) The atomic number is 17. Write its electronic configuration.(b) Draw the electron dot structure of chlorine molecule.
Answer» Question 41 In electron dot structure, the valence shell electrons are represented by crosses or dots (a) The atomic number is 17. Write its electronic configuration. (b) Draw the electron dot structure of chlorine molecule.

Discussion

41.	Which of the following(s) is/are poisonous?
Answer» Which of the following(s) is/are poisonous?

Discussion

42.	How hybridisation of [Ti(H2O)6]3+ is d2sp3 and is paramagnetic?Please explain on the basis of VBT electronic configuration diagram.
Answer» How hybridisation of [Ti(H₂O)₆]³⁺ is d²sp³ and is paramagnetic?Please explain on the basis of VBT electronic configuration diagram.

Discussion

43.	The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber's process is :
Answer» The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber's process is :

Discussion

44.	36.The apparent depth of water in cylindrical tank of diameter 2R cm is reducing at rate x cm/s when water is being drained out at constant rate. The amount of water drained in cc/minutes
Answer» 36.The apparent depth of water in cylindrical tank of diameter 2R cm is reducing at rate x cm/s when water is being drained out at constant rate. The amount of water drained in cc/minutes

Discussion

45.	why tertiary alcohols cannot be obtained by reduction of carbonyl compounds
Answer» why tertiary alcohols cannot be obtained by reduction of carbonyl compounds

Discussion

46.	48. The molecules of gas A travels at a speed four times faster than that of molecules of gas B. calculate the ratio of their molecular masses (mA/mB)
Answer» 48. The molecules of gas A travels at a speed four times faster than that of molecules of gas B. calculate the ratio of their molecular masses (mA/mB)

Discussion

47.	Dimethyl ether & ethyl alcohol are
Answer» Dimethyl ether & ethyl alcohol are

Discussion

48.	When 25 ml of H2O2 solution having volume strength of 4.48, is treated with borax in presence of NaOH solution, the no. of millimoles of sodium perborate formed is:
Answer» When 25 ml of $H_{2} O_{2}$ solution having volume strength of 4.48, is treated with borax in presence of NaOH solution, the no. of millimoles of sodium perborate formed is:

Discussion

49.	A mixture of N2 and O2 gases in a cylinder contains 7 g of N2 and 8 g of O2. If the total pressure of the mixture of the gases in the cylinder is 12 bar, then the partial pressure of N2 is:[Use atomic masses, N=14 u,O=16 u]
Answer» A mixture of $N_{2}$ and $O_{2}$ gases in a cylinder contains $7 g$ of $N_{2}$ and $8 g$ of $O_{2}$ . If the total pressure of the mixture of the gases in the cylinder is $12 bar$ , then the partial pressure of $N_{2}$ is: [Use atomic masses, $N = 14 u, O = 16 u$ ]

Discussion

50.	HOW MANY GEOMETRICAL ISOMERS CAN BE DRAWN FOR 1,2,3,4,5,6 HEXACHLOROCYCLOHEXAN
Answer» HOW MANY GEOMETRICAL ISOMERS CAN BE DRAWN FOR 1,2,3,4,5,6 HEXACHLOROCYCLOHEXAN

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Why is N2 less reactive at room temperature?

A primary alkyl halide would prefer to undergo.......... (a) SN1 reaction (b) SN2 reaction (c) α− elimination (d) racemisation

air contains 70% of nitrogen and 30% of oxygen by moles find average molar mass

How many optically active stereoisomers are possible for butane-2,3-diol?

For which of the following concentrations , the sparingly soluble salt CaCO3 will not precipitate at 25∘C Given, Ksp(CaCO3)=3.8×10−9

23. The product obtain when the chlorine gas react with cold and dilute aq.NaoH are 1. Cl & clo2 2. Clo & col3 3. Clo2 & clo3 4. Cl & clo

In the reaction scheme shown below, Q, R, and S are the major products.The correct structure of:

Which of the following is not hygroscopic 1) NaCl 2) MgCl2 3) CaCl2 4) LiCl

The correct statement(s) about surface properties is (are)

Why does an object take same time to go up and come down? Although they travel same distance but the force of attraction should be large when it comes down, so logically it should take comparatively less time to come down than to go up (Neglect air resistance)

In the following reactions, The major products (A) and (C) are respectively:

In the photoelectric effect, the strength of the photoelectric current is proportional to

Which among the following gases has highest critical temperature 1)H2 2)O2 3)Co2 4)NH3

How many mole of lead chloride will be formed from a reaction between 6.5 grams of PbO and 3.2 grams of HCl ?

What is the hydrolysis constant of a weak acid-weak base?

Quantify the total charge present in 3.5 moles of phosphate ion in Faraday unit.

Which step is the rate determining step in esterification reaction? How to predict rds in such reactions?

As per IUPAC nomenclature, sodium nitroprusside is also called

Mole fraction of solute in aqueous solution of 30% NaOH.

Burst the bubbles that contain an Arrhenius base.

The reaction of benzyl chloride with sodium cyanide followed by reduction with hydrogen in the presence of nickel give

Writethe names of reagents and equations for the preparation of thefollowing ethers by Williamson’s synthesis:(i) 1-Propoxypropane(ii) Ethoxybenzene(iii) 2-Methoxy-2-methylpropane (iv) 1-Methoxyethane

The correct order of reactivity of PhMgBr with following compounds will be: (1).(C6H5)2CO, (2).CH3−CH=O, (3).(CH3)2C=O

Hello sir/ma'am My doubt is that for an isothermal reversible process why should ∆H = 0? Shouldn't it have some other value because there is a change in volume?( ∆H=∆U+P∆V, ∆U=0 )

Name the type of bond formed by :-1 Px+Px orbital on y or z internuclear axis2Py+Py orbital on x or z internuclear axis3 Pz+Pz orbital on x or y internuclear axis

Isopropyl alcohol on treatment with an excess of conc.H2SO4 gives 'X' which on treatment with HBr gives 'Y'. When 'Y' is dissolved in ether and treated with sodium gives 'Z'. Calculate the molecular weight of 'Z'.

Suggest a reagent for conversion of ethanol to ethanal.

Which has maximum bond energy? a)Cl2 b)Br2 c)F2 d)I2

11. Alcohol reacts with Grignard Reagant to form (a)Alkanes (b)Alkenes (c)Alkynes (d)All of them

In which of the following ionisation processes has the bond order increased and the magnetic behaviour changed?

Arrange the following set of compounds in order of their decreasing relative reactivity with an electrophile, E+ (a)Chlorobenzene, 2,4-dinitrochlorobenzene, p-nitrochlorobenzene (b)Toluene, p−H3C−C6H4−NO2,p−O2N−C6H4−NO2.

0.1 M CH3COOH is titrated with 0.1 M NaOH solution. What would be the difference in pH between 14th and34th stages of neutralization of the acid?

What will be the concentration of H+ in a solution if potential of hydrogen electrode is -118.2mV? (Partial pressure of H2 is 1 atm)

11.What is the correct order of increasing second ionisation energy in Lithium,Berilium,Boron and Carbon?

A bottle of dry ammonia and a dry bottle of HCL connected through a long tube are opened simul†an eously at both ends , the white ammonium chloride ring first formed will be 1)at the centre of the tube 2)near the HCL bottle 3) near the ammonia bottle 4)throughout the length of the tube

why we don't cancel out molecular mass and valency if they have a common factor in equivalent mass ?

Find out the correct order of basic strength among the given compounds.

Which one of the following will be reactive for Perkin condensation ?

Question 41In electron dot structure, the valence shell electrons are represented by crosses or dots(a) The atomic number is 17. Write its electronic configuration.(b) Draw the electron dot structure of chlorine molecule.

Which of the following(s) is/are poisonous?

How hybridisation of [Ti(H2O)6]3+ is d2sp3 and is paramagnetic?Please explain on the basis of VBT electronic configuration diagram.

The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber's process is :

36.The apparent depth of water in cylindrical tank of diameter 2R cm is reducing at rate x cm/s when water is being drained out at constant rate. The amount of water drained in cc/minutes

why tertiary alcohols cannot be obtained by reduction of carbonyl compounds

48. The molecules of gas A travels at a speed four times faster than that of molecules of gas B. calculate the ratio of their molecular masses (mA/mB)

Dimethyl ether &amp; ethyl alcohol are

When 25 ml of H2O2 solution having volume strength of 4.48, is treated with borax in presence of NaOH solution, the no. of millimoles of sodium perborate formed is:

A mixture of N2 and O2 gases in a cylinder contains 7 g of N2 and 8 g of O2. If the total pressure of the mixture of the gases in the cylinder is 12 bar, then the partial pressure of N2 is:[Use atomic masses, N=14 u,O=16 u]

HOW MANY GEOMETRICAL ISOMERS CAN BE DRAWN FOR 1,2,3,4,5,6 HEXACHLOROCYCLOHEXAN

Dimethyl ether & ethyl alcohol are