Class 12 Chemistry Chapter 9 Amines MCQs Updated 2024

Q.1: Which of the following is the IUPAC name of CH₃NH₂?
(a) Methylamine
(b) Methanamine
(c) Aminomethane
(d) Methamine

Answer: (b) Methanamine
Explanation: The IUPAC name for CH₃NH₂ is Methanamine.

Q.2: Which of the following amines will exhibit intermolecular hydrogen bonding?
(a) Trimethylamine
(b) Dimethylamine
(c) Ethylamine
(d) Methylamine

Answer: (d) Methylamine
Explanation: Primary amines like methylamine exhibit intermolecular hydrogen bonding.

Q.3: Which of the following compounds will react with CH₃Br to form an ethylammonium salt?
(a) NH₃
(b) C₂H₅NH₂
(c) C₆H₅NH₂
(d) CH₃NH₂

Answer: (b) C₂H₅NH₂
Explanation: Ethylamine (C₂H₅NH₂) reacts with CH₃Br to form an ethylammonium salt.

Q.4: Which of the following is a secondary amine?
(a) Ethylamine
(b) Trimethylamine
(c) Diethylamine
(d) Aniline

Answer: (c) Diethylamine
Explanation: Diethylamine is a secondary amine with two ethyl groups attached to the nitrogen atom.

Q.5: Which of the following amines is the least basic?
(a) Ethylamine
(b) Aniline
(c) Ammonia
(d) Methylamine

Answer: (b) Aniline
Explanation: Aniline is less basic due to the electron-withdrawing nature of the phenyl group.

Q.6: Which of the following is formed when nitrobenzene is reduced with tin and hydrochloric acid?
(a) Benzene
(b) Aniline
(c) Nitrobenzene
(d) Azobenzene

Answer: (b) Aniline
Explanation: Nitrobenzene is reduced to aniline using tin and hydrochloric acid.

Q.7: Which of the following is the correct order of basicity for the given amines?
(a) Aniline > Ethylamine > Ammonia
(b) Ethylamine > Ammonia > Aniline
(c) Ammonia > Ethylamine > Aniline
(d) Aniline > Ammonia > Ethylamine

Answer: (b) Ethylamine > Ammonia > Aniline
Explanation: The basicity order is Ethylamine > Ammonia > Aniline due to the inductive effect of the alkyl group and the resonance effect of the phenyl group.

Q.8: Which of the following amines can form N-nitrosamine with nitrous acid?
(a) Aniline
(b) Ethylamine
(c) Diethylamine
(d) Trimethylamine

Answer: (c) Diethylamine
Explanation: Secondary amines like diethylamine react with nitrous acid to form N-nitrosamine.

Q.9: Which of the following is formed when aniline reacts with bromine water?
(a) Bromobenzene
(b) Tribromoaniline
(c) Dibromoaniline
(d) Monobromoaniline

Answer: (b) Tribromoaniline
Explanation: Aniline reacts with bromine water to form 2,4,6-tribromoaniline.

Q.10: Which of the following reactions is used for the preparation of primary aromatic amines?
(a) Wurtz reaction
(b) Hoffmann bromamide reaction
(c) Sandmeyer reaction
(d) Gabriel phthalimide synthesis

Answer: (b) Hoffmann bromamide reaction
Explanation: Hoffmann bromamide reaction is used to prepare primary aromatic amines.

Q.11: Which of the following is the product of the reaction between benzyl chloride and ammonia?
(a) Benzyl alcohol
(b) Benzylamine
(c) Benzyl acetate
(d) Benzaldehyde

Answer: (b) Benzylamine
Explanation: Benzyl chloride reacts with ammonia to form benzylamine.

Q.12: Which of the following is the major product when aniline reacts with acetic anhydride?
(a) N-Phenylacetamide
(b) N,N-Diethylacetamide
(c) Acetanilide
(d) Anilinium acetate

Answer: (c) Acetanilide
Explanation: Aniline reacts with acetic anhydride to form acetanilide.

Q.13: Which of the following is the correct order of decreasing basicity for the given compounds?
(a) Aniline > Ethylamine > Methylamine
(b) Methylamine > Ethylamine > Aniline
(c) Ethylamine > Methylamine > Aniline
(d) Methylamine > Aniline > Ethylamine

Answer: (c) Ethylamine > Methylamine > Aniline
Explanation: The basicity order is Ethylamine > Methylamine > Aniline due to the inductive effect and resonance effect.

Q.14: Which of the following is the major product of the reduction of nitrobenzene?
(a) Aniline
(b) Benzylamine
(c) Phenylhydrazine
(d) Benzidine

Answer: (a) Aniline
Explanation: Nitrobenzene is reduced to aniline.

Q.15: Which of the following is the major product of the reaction of aniline with acetic acid?
(a) Acetanilide
(b) Aniline hydrochloride
(c) N-Methyl aniline
(d) Phenyl acetate

Answer: (a) Acetanilide
Explanation: Aniline reacts with acetic acid to form acetanilide.

Q.16: Which of the following is the product of the reaction between methylamine and nitrous acid?
(a) Methyl alcohol
(b) Methane
(c) Methyl nitrate
(d) Dimethylamine

Answer: (a) Methyl alcohol
Explanation: Methylamine reacts with nitrous acid to form methyl alcohol.

Q.17: Which of the following amines will not undergo diazotization?
(a) Ethylamine
(b) Methylamine
(c) Aniline
(d) Diphenylamine

Answer: (d) Diphenylamine
Explanation: Secondary and tertiary amines do not undergo diazotization.

Q.18: Which of the following is the correct order of boiling points for the given amines?
(a) Ethylamine > Aniline > Methylamine
(b) Aniline > Ethylamine > Methylamine
(c) Methylamine > Ethylamine > Aniline
(d) Aniline > Methylamine > Ethylamine

Answer: (b) Aniline > Ethylamine > Methylamine
Explanation: The boiling point order is Aniline > Ethylamine > Methylamine due to the molecular weight and hydrogen bonding.

Q.19: Which of the following compounds is not formed when aniline is treated with chloroform and alcoholic KOH?
(a) Phenyl isocyanide
(b) Aniline hydrochloride
(c) Acetanilide
(d) Benzene

Answer: (c) Acetanilide
Explanation: Aniline reacts with chloroform and alcoholic KOH to form phenyl isocyanide (carbylamine reaction).

Q.20: Which of the following amines is the most basic?
(a) Aniline
(b) Ethylamine
(c) Dimethylamine
(d) Trimethylamine

Answer: (c) Dimethylamine
Explanation: Dimethylamine is more basic due to the electron-donating alkyl groups.

Q.21: Which of the following reactions is used to convert primary amines into secondary amines?
(a) Gabriel phthalimide synthesis
(b) Hofmann bromamide reaction
(c) Reductive amination
(d) Sandmeyer reaction

Answer: (c) Reductive amination
Explanation: Reductive amination is used to convert primary amines into secondary amines.

Q.22: Which of the following compounds is used in the preparation of azo dyes?
(a) Aniline
(b) Benzene
(c) Ethanol
(d) Acetone

Answer: (a) Aniline
Explanation: Aniline is used in the preparation of azo dyes.

Q.23: Which of the following is the product of the reaction between phenylamine and acetic anhydride?
(a) Phenylacetamide
(b) N-Phenylacetamide
(c) Acetanilide
(d) Aniline acetate

Answer: (c) Acetanilide
Explanation: Phenylamine reacts with acetic anhydride to form acetanilide.

Q.24: Which of the following amines will not form an N-nitrosamine with nitrous acid?
(a) Dimethylamine
(b) Trimethylamine
(c) Ethylamine
(d) Methylamine

Answer: (b) Trimethylamine
Explanation: Tertiary amines like trimethylamine do not form N-nitrosamine with nitrous acid.

Q.25: Which of the following is the product of the reaction of benzylamine with nitrous acid?
(a) Benzyl alcohol
(b) Benzene
(c) Benzamide
(d) Benzyl acetate

Answer: (a) Benzyl alcohol
Explanation: Benzylamine reacts with nitrous acid to form benzyl alcohol.

Q.26: Which of the following amines will react with nitrous acid to form a diazonium salt?
(a) Aniline
(b) Ethylamine
(c) Methylamine
(d) Diphenylamine

Answer: (a) Aniline
Explanation: Aniline reacts with nitrous acid to form a diazonium salt.

Q.27: Which of the following is the correct order of solubility for the given amines in water?
(a) Aniline > Ethylamine > Methylamine
(b) Ethylamine > Methylamine > Aniline
(c) Methylamine > Ethylamine > Aniline
(d) Aniline > Methylamine > Ethylamine

Answer: (c) Methylamine > Ethylamine > Aniline
Explanation: The solubility order is Methylamine > Ethylamine > Aniline due to the hydrogen bonding.

Q.28: Which of the following is the major product when aniline reacts with HNO₂ at 0°C?
(a) Benzene
(b) Phenol
(c) Diazonium salt
(d) Azobenzene

Answer: (c) Diazonium salt
Explanation: Aniline reacts with HNO₂ at 0°C to form a diazonium salt.

Q.29: Which of the following is the product of the reaction between aniline and acetic acid?
(a) Acetanilide
(b) Aniline hydrochloride
(c) N-Methyl aniline
(d) Phenyl acetate

Answer: (a) Acetanilide
Explanation: Aniline reacts with acetic acid to form acetanilide.

Q.30: Which of the following amines will react with nitrous acid to form a diazonium salt?
(a) Aniline
(b) Ethylamine
(c) Methylamine
(d) Diphenylamine

Answer: (a) Aniline
Explanation: Aniline reacts with nitrous acid to form a diazonium salt.

Q.31: Which of the following compounds will react with benzoyl chloride to form a secondary amide?
(a) Aniline
(b) Benzylamine
(c) Diphenylamine
(d) Trimethylamine

Answer: (c) Diphenylamine
Explanation: Diphenylamine reacts with benzoyl chloride to form a secondary amide.

Q.32: Which of the following is the major product of the reaction of aniline with acetic anhydride?
(a) Acetanilide
(b) Aniline hydrochloride
(c) N-Methyl aniline
(d) Phenyl acetate

Answer: (a) Acetanilide
Explanation: Aniline reacts with acetic anhydride to form acetanilide.

Q.33: Which of the following amines will not undergo diazotization?
(a) Ethylamine
(b) Methylamine
(c) Aniline
(d) Diphenylamine

Answer: (d) Diphenylamine
Explanation: Secondary and tertiary amines do not undergo diazotization.

Q.34: Which of the following is the correct order of basicity for the given compounds?
(a) Aniline > Ethylamine > Methylamine
(b) Methylamine > Ethylamine > Aniline
(c) Ethylamine > Methylamine > Aniline
(d) Methylamine > Aniline > Ethylamine

Answer: (c) Ethylamine > Methylamine > Aniline
Explanation: The basicity order is Ethylamine > Methylamine > Aniline due to the inductive effect and resonance effect.

Q.35: Which of the following is the major product of the reaction of aniline with acetic acid?
(a) Acetanilide
(b) Aniline hydrochloride
(c) N-Methyl aniline
(d) Phenyl acetate

Answer: (a) Acetanilide
Explanation: Aniline reacts with acetic acid to form acetanilide.

Q.36: Which of the following is the major product when aniline reacts with HNO₂ at 0°C?
(a) Benzene
(b) Phenol
(c) Diazonium salt
(d) Azobenzene

Answer: (c) Diazonium salt
Explanation: Aniline reacts with HNO₂ at 0°C to form a diazonium salt.

Q.37: Which of the following is the product of the reaction between phenylamine and acetic anhydride?
(a) Phenylacetamide
(b) N-Phenylacetamide
(c) Acetanilide
(d) Aniline acetate

Answer: (c) Acetanilide
Explanation: Phenylamine reacts with acetic anhydride to form acetanilide.

Q.38: Which of the following is the product of the reaction between benzylamine and nitrous acid?
(a) Benzyl alcohol
(b) Benzene
(c) Benzamide
(d) Benzyl acetate

Answer: (a) Benzyl alcohol
Explanation: Benzylamine reacts with nitrous acid to form benzyl alcohol.

Q.39: Which of the following amines will not form an N-nitrosamine with nitrous acid?
(a) Dimethylamine
(b) Trimethylamine
(c) Ethylamine
(d) Methylamine

Answer: (b) Trimethylamine
Explanation: Tertiary amines like trimethylamine do not form N-nitrosamine with nitrous acid.

Q.40: Which of the following is the major product when aniline reacts with bromine water?
(a) Bromobenzene
(b) Tribromoaniline
(c) Dibromoaniline
(d) Monobromoaniline

Answer: (b) Tribromoaniline
Explanation: Aniline reacts with bromine water to form 2,4,6-tribromoaniline.

Q.41: Which of the following is the product of the reaction between aniline and acetic acid?
(a) Acetanilide
(b) Aniline hydrochloride
(c) N-Methyl aniline
(d) Phenyl acetate

Answer: (a) Acetanilide
Explanation: Aniline reacts with acetic acid to form acetanilide.

Q.42: Which of the following amines will react with nitrous acid to form a diazonium salt?
(a) Aniline
(b) Ethylamine
(c) Methylamine
(d) Diphenylamine

Answer: (a) Aniline
Explanation: Aniline reacts with nitrous acid to form a diazonium salt.

Q.43: Which of the following amines will not undergo diazotization?
(a) Ethylamine
(b) Methylamine
(c) Aniline
(d) Diphenylamine

Answer: (d) Diphenylamine
Explanation: Secondary and tertiary amines do not undergo diazotization.

Q.44: Which of the following is the correct order of basicity for the given compounds?
(a) Aniline > Ethylamine > Methylamine
(b) Methylamine > Ethylamine > Aniline
(c) Ethylamine > Methylamine > Aniline
(d) Methylamine > Aniline > Ethylamine

Answer: (c) Ethylamine > Methylamine > Aniline
Explanation: The basicity order is Ethylamine > Methylamine > Aniline due to the inductive effect and resonance effect.

Q.45: Which of the following is the major product of the reaction of aniline with acetic acid?
(a) Acetanilide
(b) Aniline hydrochloride
(c) N-Methyl aniline
(d) Phenyl acetate

Answer: (a) Acetanilide
Explanation: Aniline reacts with acetic acid to form acetanilide.

Q.46: Which of the following is the major product when aniline reacts with HNO₂ at 0°C?
(a) Benzene
(b) Phenol
(c) Diazonium salt
(d) Azobenzene

Answer: (c) Diazonium salt
Explanation: Aniline reacts with HNO₂ at 0°C to form a diazonium salt.

Q.47: Which of the following is the product of the reaction between phenylamine and acetic anhydride?
(a) Phenylacetamide
(b) N-Phenylacetamide
(c) Acetanilide
(d) Aniline acetate

Answer: (c) Acetanilide
Explanation: Phenylamine reacts with acetic anhydride to form acetanilide.

Q.48: Which of the following is the product of the reaction between benzylamine and nitrous acid?
(a) Benzyl alcohol
(b) Benzene
(c) Benzamide
(d) Benzyl acetate

Answer: (a) Benzyl alcohol
Explanation: Benzylamine reacts with nitrous acid to form benzyl alcohol.

Q.49: Which of the following amines will not form an N-nitrosamine with nitrous acid?
(a) Dimethylamine
(b) Trimethylamine
(c) Ethylamine
(d) Methylamine

Answer: (b) Trimethylamine
Explanation: Tertiary amines like trimethylamine do not form N-nitrosamine with nitrous acid.

Q.50: Which of the following is the major product when aniline reacts with bromine water?
(a) Bromobenzene
(b) Tribromoaniline
(c) Dibromoaniline
(d) Monobromoaniline

Answer: (b) Tribromoaniline
Explanation: Aniline reacts with bromine water to form 2,4,6-tribromoaniline.

Q.51: Which of the following is the product of the reaction between aniline and acetic acid?
(a) Acetanilide
(b) Aniline hydrochloride
(c) N-Methyl aniline
(d) Phenyl acetate

Answer: (a) Acetanilide
Explanation: Aniline reacts with acetic acid to form acetanilide.

Q.52: Which of the following amines will react with nitrous acid to form a diazonium salt?
(a) Aniline
(b) Ethylamine
(c) Methylamine
(d) Diphenylamine

Answer: (a) Aniline
Explanation: Aniline reacts with nitrous acid to form a diazonium salt.

Q.53: Which of the following amines will not undergo diazotization?
(a) Ethylamine
(b) Methylamine
(c) Aniline
(d) Diphenylamine

Answer: (d) Diphenylamine
Explanation: Secondary and tertiary amines do not undergo diazotization.

Q.54: Which of the following is the correct order of basicity for the given compounds?
(a) Aniline > Ethylamine > Methylamine
(b) Methylamine > Ethylamine > Aniline
(c) Ethylamine > Methylamine > Aniline
(d) Methylamine > Aniline > Ethylamine

Answer: (c) Ethylamine > Methylamine > Aniline
Explanation: The basicity order is Ethylamine > Methylamine > Aniline due to the inductive effect and resonance effect.

Q.55: Which of the following is the major product of the reaction of aniline with acetic acid?
(a) Acetanilide
(b) Aniline hydrochloride
(c) N-Methyl aniline
(d) Phenyl acetate

Answer: (a) Acetanilide
Explanation: Aniline reacts with acetic acid to form acetanilide.

Q.56: Which of the following is the major product when aniline reacts with HNO₂ at 0°C?
(a) Benzene
(b) Phenol
(c) Diazonium salt
(d) Azobenzene

Answer: (c) Diazonium salt
Explanation: Aniline reacts with HNO₂ at 0°C to form a diazonium salt.

Q.57: Which of the following is the product of the reaction between phenylamine and acetic anhydride?
(a) Phenylacetamide
(b) N-Phenylacetamide
(c) Acetanilide
(d) Aniline acetate

Answer: (c) Acetanilide
Explanation: Phenylamine reacts with acetic anhydride to form acetanilide.

Q.58: Which of the following is the product of the reaction between benzylamine and nitrous acid?
(a) Benzyl alcohol
(b) Benzene
(c) Benzamide
(d) Benzyl acetate

Answer: (a) Benzyl alcohol
Explanation: Benzylamine reacts with nitrous acid to form benzyl alcohol.

Q.59: Which of the following amines will not form an N-nitrosamine with nitrous acid?
(a) Dimethylamine
(b) Trimethylamine
(c) Ethylamine
(d) Methylamine

Answer: (b) Trimethylamine
Explanation: Tertiary amines like trimethylamine do not form N-nitrosamine with nitrous acid.

Q.60: Which of the following is the major product when aniline reacts with bromine water?
(a) Bromobenzene
(b) Tribromoaniline
(c) Dibromoaniline
(d) Monobromoaniline

Answer: (b) Tribromoaniline
Explanation: Aniline reacts with bromine water to form 2,4,6-tribromoaniline.

Q.61: Which of the following is the product of the reaction between aniline and acetic acid?
(a) Acetanilide
(b) Aniline hydrochloride
(c) N-Methyl aniline
(d) Phenyl acetate

Answer: (a) Acetanilide
Explanation: Aniline reacts with acetic acid to form acetanilide.

Q.62: Which of the following amines will react with nitrous acid to form a diazonium salt?
(a) Aniline
(b) Ethylamine
(c) Methylamine
(d) Diphenylamine

Answer: (a) Aniline
Explanation: Aniline reacts with nitrous acid to form a diazonium salt.

Q.63: Which of the following amines will not undergo diazotization?
(a) Ethylamine
(b) Methylamine
(c) Aniline
(d) Diphenylamine

Answer: (d) Diphenylamine
Explanation: Secondary and tertiary amines do not undergo diazotization.

Q.64: Which of the following is the correct order of basicity for the given compounds?
(a) Aniline > Ethylamine > Methylamine
(b) Methylamine > Ethylamine > Aniline
(c) Ethylamine > Methylamine > Aniline
(d) Methylamine > Aniline > Ethylamine

Answer: (c) Ethylamine > Methylamine > Aniline
Explanation: The basicity order is Ethylamine > Methylamine > Aniline due to the inductive effect and resonance effect.

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