46295 + Interview Questions in Chemistry

1.	Why liquids diffuse slowly as compared to gases
Answer» Why liquids diffuse slowly as compared to gases

Discussion

2.	What is the maximum concentration of an equimolar solution of ferrous sulphate(FeSO4) and sodium sulphide (Na2S) so that when mixed in equal volumes, there is not precipitation of iron sulphide (FeS)? (For FeS, Ksp=5×10−18)
Answer» What is the maximum concentration of an equimolar solution of ferrous sulphate $(F e S O_{4})$ and sodium sulphide $(N a_{2} S)$ so that when mixed in equal volumes, there is not precipitation of iron sulphide $(F e S)$ ? (For FeS, $K_{s p} = 5 \times 10^{- 18}$ )

Discussion

3.	1 g of charcoal adsorbs CH3COOH from 100 mL of 0.6 M CH3COOH aqueous solution to form a monolayer, and the molarity of CH3COOH reduces to 0.58 in this process. Calculate the surface area of the charcoal adsorbed by each molecule of acetic acid. Surface area of charcoal = 3.0×102 m2/g
Answer» 1 g of charcoal adsorbs $C H_{3} C O O H$ from $100 mL$ of $0.6 M C H_{3} C O O H$ aqueous solution to form a monolayer, and the molarity of $C H_{3} C O O H$ reduces to $0.58$ in this process. Calculate the surface area of the charcoal adsorbed by each molecule of acetic acid. Surface area of charcoal = $3.0 \times 10^{2} m^{2} / g$

Discussion

4.	What volume of air in m3 is needed for the combustion of 1 m3 of a gas having the following composition in percentage volume: 2% of C2H2, 8% of CO, 35% of CH4, 50% of H2 and 5% of non-combustible gas. The air contains 20.8% (by volume) of oxygen.
Answer» What volume of air $in m^{3}$ is needed for the combustion of $1 m^{3}$ of a gas having the following composition in percentage volume: $2 %$ of $C_{2} H_{2}$ , $8 %$ of $C O$ , $35 %$ of $C H_{4}$ , $50 %$ of $H_{2}$ and $5 %$ of non-combustible gas. The air contains $20.8 %$ (by volume) of oxygen.

Discussion

5.	Which of the following reaction will not give ether as final product?
Answer» Which of the following reaction will not give ether as final product?

Discussion

6.	Column-IColumn-IIi) 0.5 mole of SO2(g)p) Occupies 11.2 L at 1 atm and 273 Kii) 1 g of H2(g)q) Weighs 24 giii) 0.5 mole of O3(g)r) Total atoms=1.5×NAiv) 1 g molecule of O2(g)s) Weighs 32 g
Answer» $\begin{matrix} Column-I & Column-II i) 0.5 mole of S O_{2} (g) & p) Occupies 11.2 L at 1 atm and 273 K ii) 1 g of H_{2} (g) & q) Weighs 24 g iii) 0.5 mole of O_{3} (g) & r) Total atoms = 1.5 \times N_{A} iv) 1 g molecule of O_{2} (g) & s) Weighs 32 g \end{matrix}$

Discussion

7.	Compare the solubilities of alcohols, phenols, ethers and hydrocarbons
Answer» Compare the solubilities of alcohols, phenols, ethers and hydrocarbons

Discussion

8.	Assuming the reactions to be balanced, select the incorrect option from the following:
Answer» Assuming the reactions to be balanced, select the incorrect option from the following:

Discussion

9.	Determining standard state cell potentials.
Answer» Determining standard state cell potentials.

Discussion

10.	The amount of anhydrous Na2CO3 present in 250 mL of 0.25 M solution is:
Answer» The amount of anhydrous $N a_{2} C O_{3}$ present in 250 mL of 0.25 M solution is:

Discussion

11.	A solution of ethanol, C2H5OH, is prepared by dissolving 25.0 mL of ethanol in enough water to give a total volume of 250.0 mL. What is the volume percent of ethanol?
Answer» A solution of ethanol, C₂H₅OH, is prepared by dissolving 25.0 mL of ethanol in enough water to give a total volume of 250.0 mL. What is the volume percent of ethanol?

Discussion

12.	The maximum number of isomers (including stereoisomers) that are possible during monochlorination of the following compound are
Answer» The maximum number of isomers (including stereoisomers) that are possible during monochlorination of the following compound are

Discussion

13.	Why is para nitrobenzene anion less stable than meta?
Answer» Why is para nitrobenzene anion less stable than meta?

Discussion

14.	Balance by Ion electon method, Cr2O−27+Fe+2→Cr+3+H2O (in acidic medium).
Answer» Balance by Ion electon method, $C r_{2} O_{7}^{- 2} + F e^{+ 2} \to C r^{+ 3} + H_{2} O$ (in acidic medium).

Discussion

15.	Which is the strongest base that can exist in water?
Answer» Which is the strongest base that can exist in water?

Discussion

16.	[Ti(NCS)6]3− ion exhibits a single absorption band at 900 nm. What will be the crystal field splitting energy ( inkJmol−1) of the complex? (Given:h=6.6×10−34 Js; c=3.0×108 m/s; NA=6.0×1023 ions/mole
Answer» $[T i (N C S)_{6}]^{3 -}$ ion exhibits a single absorption band at 900 nm. What will be the crystal field splitting energy ( in $k J m o l^{- 1})$ of the complex? (Given: $h = 6.6 \times 10^{- 34} J s; c = 3.0 \times 10^{8} m / s; N_{A} = 6.0 \times 10^{23} i o n s / m o l e$

Discussion

17.	(i) Out of (CH3)3C–Br and(CH3)3C–I, which one is more reactive towards SN1 and why? (ii) Write the product formed when p-nitrochlorobenzene is heated with aqueous NaOH at 443K followed by acidification? (iii) Why dextro and laevo-rotatory isomers of Butan-2-ol are difficult to separate by fractional distillation?
Answer» (i) Out of ${(C H_{3})}_{3} C - B r$ and ${(C H_{3})}_{3} C - I$ , which one is more reactive towards $S_{N} 1$ and why? (ii) Write the product formed when p-nitrochlorobenzene is heated with aqueous NaOH at 443K followed by acidification? (iii) Why dextro and laevo-rotatory isomers of Butan-2-ol are difficult to separate by fractional distillation?

Discussion

18.	Which of the following statements is not true about glucose? (a) It is an aldohexose (b) On heating with HI, it forms n-hexane (c) It is present in furanose form (d) It does not give 2, 4- DNP test
Answer» Which of the following statements is not true about glucose? (a) It is an aldohexose (b) On heating with HI, it forms n-hexane (c) It is present in furanose form (d) It does not give 2, 4- DNP test

Discussion

19.	Which of the following compounds will not give effervescence (CO2) with NaHCO3?
Answer» Which of the following compounds will not give effervescence $(C O_{2})$ with $N a H C O_{3}$ ?

Discussion

20.	Two identical samples of a gas are allowed to expand (i) isothermally (ii) adiabatically. Work done is
Answer» Two identical samples of a gas are allowed to expand (i) isothermally (ii) adiabatically. Work done is

Discussion

21.	Equanil is .... a) artificial sweetener b) tranquilizer c) anthistamine d) antifertility drug
Answer» Equanil is .... a) artificial sweetener b) tranquilizer c) anthistamine d) antifertility drug

Discussion

22.	Define the bond length.
Answer» Define the bond length.

Discussion

23.	[4] Looking at the deteriorating air quality because of air pollution in many cities of the country, the citizens are very much worried and concerned about their health. The doctors have declared health emergency in the cities where the air quality is very severely poor. (a) Mention any two major causes of air pollution. (b) Write any two harmful effects of air pollution to plants and humans. (c) As a captain of your school Eco-club, suggest any two programmes you would plan to organise in the school so as to bring awareness among the students on how to check air pollution in and around the school.
Answer» [4] Looking at the deteriorating air quality because of air pollution in many cities of the country, the citizens are very much worried and concerned about their health. The doctors have declared health emergency in the cities where the air quality is very severely poor. (a) Mention any two major causes of air pollution. (b) Write any two harmful effects of air pollution to plants and humans. (c) As a captain of your school Eco-club, suggest any two programmes you would plan to organise in the school so as to bring awareness among the students on how to check air pollution in and around the school.

Discussion

24.	Correct order of bond length is-
Answer» Correct order of bond length is-

Discussion

25.	What is the common name for C6H4ClCOCH3 ? (Cl is attached at Ortho position on benzene ring)
Answer» What is the common name for C6H4ClCOCH3 ? (Cl is attached at Ortho position on benzene ring)

Discussion

26.	Question 08 Colligative properties depend on ............. . (a) the nature of the solute particles dissolved in solution (b) the number of solute particles in solution (c) the physical properties of the solute particles dissolved in solution (d) the nature of solvent particles
Answer» Question 08 Colligative properties depend on ............. . (a) the nature of the solute particles dissolved in solution (b) the number of solute particles in solution (c) the physical properties of the solute particles dissolved in solution (d) the nature of solvent particles

Discussion

27.	Choose incorrect statement
Answer» Choose incorrect statement

Discussion

28.	Methane ,alkenes& alkynes do not give conformational isomers why?
Answer» Methane ,alkenes& alkynes do not give conformational isomers why?

Discussion

29.	The volume of 0.1 M NaOH required for the neutralization of 20ml of 0.05 M H2C2O4
Answer» The volume of 0.1 M NaOH required for the neutralization of 20ml of 0.05 M $H_{2} C_{2} O_{4}$

Discussion

30.	In Van der Waals equation of state of the gas law, the constant b is a measure of__.
Answer» In Van der Waals equation of state of the gas law, the constant b is a measure of__.

Discussion

31.	Consider the following compounds hyperconjugation occurs in
Answer» Consider the following compounds hyperconjugation occurs in

31.

Consider the following compounds hyperconjugation occurs in

Answer»

Consider the following compounds

hyperconjugation occurs in

Discussion

32.	(i) What is the role of benzoyl peroxide in the polymerization of ethene? (ii) Identify the monomers in the following polymer: (iii) Arrange the following polymers in the increasing order of their intermolecular forces: Nylon-6, 6, Polythene, Buna-S
Answer» (i) What is the role of benzoyl peroxide in the polymerization of ethene? (ii) Identify the monomers in the following polymer: (iii) Arrange the following polymers in the increasing order of their intermolecular forces: Nylon-6, 6, Polythene, Buna-S

Discussion

33.	Identify the INCORRECT statement.
Answer» Identify the INCORRECT statement.

Discussion

34.	A reaction 2A+BK−→C+D is first order w.r.t. and second order w.r.t. . Initial conc. (t=0) of is C0 while is 2C0. If at as 300 minutes the conc. of C is C04 then rate expression at t = 300 minutes is
Answer» A reaction $2 A + B K - \to C + D$ is first order w.r.t. and second order w.r.t. . Initial conc. (t=0) of is $C_{0}$ while is $2 C_{0}$ . If at as 300 minutes the conc. of C is $\frac{C_{0}}{4}$ then rate expression at t = 300 minutes is

Discussion

35.	For a reaction, P+Q→R+S. The value of △Ho is−30 kJ mol−1 and △S is−100 J K−1mol−1. At what temperature the reaction will be at equilibrium?
Answer» For a reaction, $P + Q \to R + S .$ The value of $△ H^{o} i s - 30 k J m o l^{- 1} a n d △ S i s - 100 J K^{- 1} m o l^{- 1} .$ At what temperature the reaction will be at equilibrium?

Discussion

36.	Complexes formed in the cyanide process are:
Answer» Complexes formed in the cyanide process are:

Discussion

37.	If 3 gm of glucose (mol. wt. 180) is dissolved in 60 gm of water at 150C. Then the osmotic pressure of this solution will be
Answer» If 3 gm of glucose (mol. wt. 180) is dissolved in 60 gm of water at 15⁰C. Then the osmotic pressure of this solution will be

Discussion

38.	de-Broglie wavelength of a body of mass m and kinetic energy E is given by
Answer» de-Broglie wavelength of a body of mass m and kinetic energy E is given by

Discussion

39.	A metal M forms chlorides in its +2 and +4 oxidation states. Which of the following statements about these chlorides is correct?
Answer» A metal M forms chlorides in its +2 and +4 oxidation states. Which of the following statements about these chlorides is correct?

Discussion

40.	PCl5⇌PCl3+Cl2 in the reversible reaction, the moles of PCl5, PCl3 and Cl2 are a, b and c respectively at equilibrium and total pressure is P, then value of Kp is:
Answer» $P C l_{5} ⇌ P C l_{3} + C l_{2}$ in the reversible reaction, the moles of $P C l_{5}$ , $P C l_{3}$ and $C l_{2}$ are a, b and c respectively at equilibrium and total pressure is P, then value of $K_{p}$ is:

Discussion

41.	Identify the correct order of boiling points of the following compounds? I) CH3CH2CH2CH2OH II) CH3CH2CH2CHO III) CH3CH2CH2COOH
Answer» Identify the correct order of boiling points of the following compounds? I) $C H_{3} C H_{2} C H_{2} C H_{2} O H$ II) $C H_{3} C H_{2} C H_{2} C H O$ III) $C H_{3} C H_{2} C H_{2} C O O H$

Discussion

42.	Classify the given measure as scalar and vector: (i) 40∘
Answer» Classify the given measure as scalar and vector: (i) $40^{\circ}$

Discussion

43.	How many polymers are formed by condensation polymerisation: Teflon,Polyethene, Nylon-6, Nylon-66, Polystyrene, Terylene, Orlon, Protein
Answer» How many polymers are formed by condensation polymerisation: Teflon,Polyethene, Nylon-6, Nylon-66, Polystyrene, Terylene, Orlon, Protein

Discussion

44.	The electronic configuration of Ti2+ is
Answer» The electronic configuration of $T i^{2 +}$ is

Discussion

45.	C6H6+Cl2Fel3−−→X+HClC6H6+HNO3H2SO4−−−−→<60∘CY+H2OC6H6+CH3COClAlCl3−−−→Z+HCl The correct order of reactivity of X, Y, Z towards electrophilic substituation reaction is
Answer» $C_{6} H_{6} + C l_{2} F e l_{3} - - \to X + H C l C_{6} H_{6} + H N O_{3} H_{2} S O_{4} - --- \to < 60^{\circ} C Y + H_{2} O C_{6} H_{6} + C H_{3} C O C l A l C l_{3} - -- \to Z + H C l$ The correct order of reactivity of X, Y, Z towards electrophilic substituation reaction is

45.

C6H6+Cl2Fel3−−→X+HClC6H6+HNO3H2SO4−−−−→<60∘CY+H2OC6H6+CH3COClAlCl3−−−→Z+HCl The correct order of reactivity of X, Y, Z towards electrophilic substituation reaction is

Answer»

$C_{6} H_{6} + C l_{2} F e l_{3} - - \to X + H C l C_{6} H_{6} + H N O_{3} H_{2} S O_{4} - --- \to < 60^{\circ} C Y + H_{2} O C_{6} H_{6} + C H_{3} C O C l A l C l_{3} - -- \to Z + H C l$

The correct order of reactivity of X, Y, Z towards electrophilic substituation reaction is

Discussion

46.	Find the overall order of a reaction whose rate constant is k = 3 x 10 -4 s-1
Answer» Find the overall order of a reaction whose rate constant is k = 3 x 10 ^-4 s^-1

Discussion

47.	What does the term half life of tritium mean?
Answer» What does the term half life of tritium mean?

Discussion

48.	Is it important to learn all the trivial names of organic compounds if I'm preparing for advanced exams?
Answer» Is it important to learn all the trivial names of organic compounds if I'm preparing for advanced exams?

Discussion

49.	Which of the following statements is not correct? (a) Some antiseptics can be added to soaps (b) Dilute solutions of some disinfectants can be used as antiseptic (c) Disinfectants are antimicrobial drugs (d) Antiseptic medicines can be ingested
Answer» Which of the following statements is not correct? (a) Some antiseptics can be added to soaps (b) Dilute solutions of some disinfectants can be used as antiseptic (c) Disinfectants are antimicrobial drugs (d) Antiseptic medicines can be ingested

Discussion

50.	Arrange the following compounds in the order of decreasing acidity.
Answer» Arrange the following compounds in the order of decreasing acidity.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Why liquids diffuse slowly as compared to gases

What is the maximum concentration of an equimolar solution of ferrous sulphate(FeSO4) and sodium sulphide (Na2S) so that when mixed in equal volumes, there is not precipitation of iron sulphide (FeS)? (For FeS, Ksp=5×10−18)

1 g of charcoal adsorbs CH3COOH from 100 mL of 0.6 M CH3COOH aqueous solution to form a monolayer, and the molarity of CH3COOH reduces to 0.58 in this process. Calculate the surface area of the charcoal adsorbed by each molecule of acetic acid. Surface area of charcoal = 3.0×102 m2/g

What volume of air in m3 is needed for the combustion of 1 m3 of a gas having the following composition in percentage volume: 2% of C2H2, 8% of CO, 35% of CH4, 50% of H2 and 5% of non-combustible gas. The air contains 20.8% (by volume) of oxygen.

Which of the following reaction will not give ether as final product?

Column-IColumn-IIi) 0.5 mole of SO2(g)p) Occupies 11.2 L at 1 atm and 273 Kii) 1 g of H2(g)q) Weighs 24 giii) 0.5 mole of O3(g)r) Total atoms=1.5×NAiv) 1 g molecule of O2(g)s) Weighs 32 g

Compare the solubilities of alcohols, phenols, ethers and hydrocarbons

Assuming the reactions to be balanced, select the incorrect option from the following:

Determining standard state cell potentials.

The amount of anhydrous Na2CO3 present in 250 mL of 0.25 M solution is:

A solution of ethanol, C2H5OH, is prepared by dissolving 25.0 mL of ethanol in enough water to give a total volume of 250.0 mL. What is the volume percent of ethanol?

The maximum number of isomers (including stereoisomers) that are possible during monochlorination of the following compound are

Why is para nitrobenzene anion less stable than meta?

Balance by Ion electon method, Cr2O−27+Fe+2→Cr+3+H2O (in acidic medium).

Which is the strongest base that can exist in water?

[Ti(NCS)6]3− ion exhibits a single absorption band at 900 nm. What will be the crystal field splitting energy ( inkJmol−1) of the complex? (Given:h=6.6×10−34 Js; c=3.0×108 m/s; NA=6.0×1023 ions/mole

Which of the following statements is not true about glucose? (a) It is an aldohexose (b) On heating with HI, it forms n-hexane (c) It is present in furanose form (d) It does not give 2, 4- DNP test

Which of the following compounds will not give effervescence (CO2) with NaHCO3?

Two identical samples of a gas are allowed to expand (i) isothermally (ii) adiabatically. Work done is

Equanil is .... a) artificial sweetener b) tranquilizer c) anthistamine d) antifertility drug

Define the bond length.

Correct order of bond length is-

What is the common name for C6H4ClCOCH3 ? (Cl is attached at Ortho position on benzene ring)

Question 08 Colligative properties depend on ............. . (a) the nature of the solute particles dissolved in solution (b) the number of solute particles in solution (c) the physical properties of the solute particles dissolved in solution (d) the nature of solvent particles

Choose incorrect statement

Methane ,alkenes&amp; alkynes do not give conformational isomers why?

The volume of 0.1 M NaOH required for the neutralization of 20ml of 0.05 M H2C2O4

In Van der Waals equation of state of the gas law, the constant b is a measure of__.

Consider the following compounds hyperconjugation occurs in

(i) What is the role of benzoyl peroxide in the polymerization of ethene? (ii) Identify the monomers in the following polymer: (iii) Arrange the following polymers in the increasing order of their intermolecular forces: Nylon-6, 6, Polythene, Buna-S

Identify the INCORRECT statement.

A reaction 2A+BK−→C+D is first order w.r.t. and second order w.r.t. . Initial conc. (t=0) of is C0 while is 2C0. If at as 300 minutes the conc. of C is C04 then rate expression at t = 300 minutes is

For a reaction, P+Q→R+S. The value of △Ho is−30 kJ mol−1 and △S is−100 J K−1mol−1. At what temperature the reaction will be at equilibrium?

Complexes formed in the cyanide process are:

If 3 gm of glucose (mol. wt. 180) is dissolved in 60 gm of water at 150C. Then the osmotic pressure of this solution will be

de-Broglie wavelength of a body of mass m and kinetic energy E is given by

A metal M forms chlorides in its +2 and +4 oxidation states. Which of the following statements about these chlorides is correct?

PCl5⇌PCl3+Cl2 in the reversible reaction, the moles of PCl5, PCl3 and Cl2 are a, b and c respectively at equilibrium and total pressure is P, then value of Kp is:

Identify the correct order of boiling points of the following compounds? I) CH3CH2CH2CH2OH II) CH3CH2CH2CHO III) CH3CH2CH2COOH

Classify the given measure as scalar and vector: (i) 40∘

How many polymers are formed by condensation polymerisation: Teflon,Polyethene, Nylon-6, Nylon-66, Polystyrene, Terylene, Orlon, Protein

The electronic configuration of Ti2+ is

C6H6+Cl2Fel3−−→X+HClC6H6+HNO3H2SO4−−−−→&lt;60∘CY+H2OC6H6+CH3COClAlCl3−−−→Z+HCl The correct order of reactivity of X, Y, Z towards electrophilic substituation reaction is

Find the overall order of a reaction whose rate constant is k = 3 x 10 -4 s-1

What does the term half life of tritium mean?

Is it important to learn all the trivial names of organic compounds if I'm preparing for advanced exams?

Which of the following statements is not correct? (a) Some antiseptics can be added to soaps (b) Dilute solutions of some disinfectants can be used as antiseptic (c) Disinfectants are antimicrobial drugs (d) Antiseptic medicines can be ingested

Arrange the following compounds in the order of decreasing acidity.

Methane ,alkenes& alkynes do not give conformational isomers why?

C6H6+Cl2Fel3−−→X+HClC6H6+HNO3H2SO4−−−−→<60∘CY+H2OC6H6+CH3COClAlCl3−−−→Z+HCl The correct order of reactivity of X, Y, Z towards electrophilic substituation reaction is