Preparing for the Joint Entrance Exam (JEE) can be a daunting task. With so many subjects to cover and so many topics to study, it can be challenging to know where to start. One essential topic in the JEE Mains syllabus is the Amines. In this article, we will provide 50+ MCQ questions on the Amines, along with detailed solutions to help you prepare for the JEE Mains exam.
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These 50+ MCQ questions are selected by the experts of studyrate.in and these are more difficult questions, which will help you to better understand Amines JEE Mains MCQ Questions with Answers.
Amines JEE Mains MCQ
Which of the following compounds is a secondary amine? a) CH3NH2 b) (CH3)2NH c) CH3CH2NH2 d) CH3CONH2
Answer: b) (CH3)2NH
Explanation: A secondary amine has two alkyl or aryl groups bonded to the nitrogen atom. (CH3)2NH satisfies this condition.
The reaction of an amine with nitrous acid (HNO2) produces: a) A diazonium salt b) An amide c) An alcohol d) An aldehyde
Answer: a) A diazonium salt
Explanation: Amines react with nitrous acid (HNO2) to form diazonium salts through a diazotization reaction.
The IUPAC name of the compound CH3CH2NHCH3 is: a) Ethanamine b) Ethylamine c) Methylethylamine d) N,N-Dimethylethylamine
Answer: c) Methylethylamine
Explanation: CH3CH2NHCH3 is methylethylamine, which is named based on the alkyl groups bonded to the nitrogen atom.
The compound CH3CH2NH2 is an example of a: a) Primary amine b) Secondary amine c) Tertiary amine d) Quaternary ammonium salt
Answer: a) Primary amine
Explanation: CH3CH2NH2 is ethylamine, which is a primary amine with one alkyl group bonded to the nitrogen atom.
The reaction of an amine with excess nitrous acid followed by hydrolysis forms: a) An amide b) An alcohol c) An aldehyde d) A carboxylic acid
Answer: d) A carboxylic acid
Explanation: The reaction of an amine with excess nitrous acid followed by hydrolysis (H3O+) forms a carboxylic acid.
The amine that forms the strongest hydrogen bonds with water is: a) Primary amine b) Secondary amine c) Tertiary amine d) Quaternary ammonium salt
Answer: a) Primary amine
Explanation: Primary amines can form two hydrogen bonds with water, making them capable of stronger hydrogen bonding compared to secondary and tertiary amines.
The compound (CH3)3N is an example of a: a) Primary amine b) Secondary amine c) Tertiary amine d) Quaternary ammonium salt
Answer: c) Tertiary amine
Explanation: (CH3)3N is trimethylamine, which is a tertiary amine with three alkyl groups bonded to the nitrogen atom.
Which of the following reagents is commonly used to convert a primary amine into a diazonium salt? a) HNO3 b) H2SO4 c) NaOH d) NaNO2
Answer: d) NaNO2
Explanation: Sodium nitrite (NaNO2) is commonly used to convert a primary amine into a diazonium salt through a diazotization reaction.
The compound (CH3)4N+Cl- is an example of a: a) Primary amine b) Secondary amine c) Tertiary amine d) Quaternary ammonium salt
Answer: d) Quaternary ammonium salt
Explanation: (CH3)4N+Cl- is tetramethylammonium chloride, which is a quaternary ammonium salt with four alkyl groups bonded to the nitrogen atom.
The compound CH3NH2 is commonly known as: a) Ammonia b) Methylamine c) Dimethylamine d) Trimethylamine
Answer: b) Methylamine
Explanation: CH3NH2 is methylamine, which is a common primary amine compound.
Which of the following compounds is an aromatic amine? a) CH3NH2 b) C6H5NH2 c) (CH3)2NH d) CH3CH2NH2
Answer: b) C6H5NH2
Explanation: C6H5NH2 is aniline, which is an aromatic amine due to the presence of the benzene ring.
The reaction of an amine with nitrous acid (HNO2) in the presence of cold conditions forms: a) An amide b) An alcohol c) A ketone d) An aldehyde
Answer: d) An aldehyde
Explanation: The reaction of an amine with nitrous acid (HNO2) in the presence of cold conditions forms an aldehyde through a diazo-coupling reaction.
The compound CH3CH2CH2NH2 is an example of a: a) Primary amine b) Secondary amine c) Tertiary amine d) Quaternary ammonium salt
Answer: a) Primary amine
Explanation: CH3CH2CH2NH2 is propylamine, which is a primary amine with one alkyl group bonded to the nitrogen atom.
The compound (CH3)2CHNH2 is an example of a: a) Primary amine b) Secondary amine c) Tertiary amine d) Quaternary ammonium salt
Answer: b) Secondary amine
Explanation: (CH3)2CHNH2 is N,N-dimethylamine, which is a secondary amine with two alkyl groups bonded to the nitrogen atom.
Which of the following compounds cannot form hydrogen bonds with water? a) Primary amine b) Secondary amine c) Tertiary amine d) Quaternary ammonium salt
Answer: c) Tertiary amine
Explanation: Tertiary amines do not have a hydrogen atom bonded to the nitrogen atom, so they cannot form hydrogen bonds with water.
The compound CH3NHCH2CH3 is an example of a: a) Primary amine b) Secondary amine c) Tertiary amine d) Quaternary ammonium salt
Answer: b) Secondary amine
Explanation: CH3NHCH2CH3 is N-methylethylamine, which is a secondary amine with one alkyl group and one hydrogen atom bonded to the nitrogen atom.
Which of the following reactions is not possible for a primary amine? a) Nitrosation b) Nitration c) Acetylation d) Diazotization
Answer: d) Diazotization
Explanation: Diazotization is a reaction specific to primary aromatic amines, not primary amines in general.
The compound (CH3)3N is commonly known as: a) Trimethylamine b) Dimethylamine c) Ethylamine d) Methylamine
Answer: a) Trimethylamine
Explanation: (CH3)3N is trimethylamine, which is a tertiary amine with three alkyl groups bonded to the nitrogen atom.
The IUPAC name of the compound C6H5NHCH3 is: a) Aniline b) Methylamine c) N-Methylaniline d) Benzylamine
Answer: c) N-Methylaniline
Explanation: C6H5NHCH3 is N-methylaniline, which is named based on the alkyl group bonded to the nitrogen atom in the aniline molecule.
Aromatic amines are more basic than aliphatic amines due to: a) The presence of a benzene ring b) The absence of a benzene ring c) The presence of a hydroxyl group d) The absence of a hydroxyl group
Answer: a) The presence of a benzene ring
Explanation: Aromatic amines, such as aniline, have a benzene ring, which stabilizes the positive charge on the nitrogen atom, making them more basic than aliphatic amines.
Which of the following reagents can be used to distinguish between primary, secondary, and tertiary amines? a) Nitrous acid b) Sodium hydroxide c) Ammonium chloride d) Potassium permanganate
Answer: a) Nitrous acid
Explanation: Nitrous acid can be used to distinguish between primary, secondary, and tertiary amines based on the different products formed during diazotization reactions.
The compound (CH3)3N+OH- is an example of a: a) Primary amine b) Secondary amine c) Tertiary amine d) Quaternary ammonium salt
Answer: d) Quaternary ammonium salt
Explanation: (CH3)3N+OH- is trimethylammonium hydroxide, which is a quaternary ammonium salt with three alkyl groups bonded to the nitrogen atom.
The reaction of an amine with an acid chloride forms: a) An amide b) An alcohol c) An aldehyde d) A carboxylic acid
Answer: a) An amide
Explanation: The reaction of an amine with an acid chloride forms an amide through nucleophilic acyl substitution.
Which of the following amines is a secondary amine? a) CH3NH2 b) (CH3)2NH c) CH3CH2NH2 d) C6H5NH2
Answer: b) (CH3)2NH
Explanation: (CH3)2NH is dimethylamine, which is a secondary amine with two alkyl groups bonded to the nitrogen atom.
Which of the following compounds undergoes oxidation to form an N-oxide? a) CH3NH2 b) (CH3)2NH c) CH3CH2NH2 d) (CH3)3N
Answer: d) (CH3)3N
Explanation: (CH3)3N is trimethylamine, which can undergo oxidation to form trimethylamine N-oxide.
The reaction of an amine with a carboxylic acid forms: a) An amide b) An ester c) A ketone d) A carboxylic acid salt
Answer: a) An amide
Explanation: The reaction of an amine with a carboxylic acid forms an amide through nucleophilic acyl substitution.
The compound C6H5NH2 is commonly known as: a) Aniline b) Methylamine c) Ethylamine d) Benzylamine
Answer: a) Aniline
Explanation: C6H5NH2 is aniline, which is a primary aromatic amine.
The compound (CH3)2CHNHCH3 is an example of a: a) Primary amine b) Secondary amine c) Tertiary amine d) Quaternary ammonium salt
Answer: b) Secondary amine
Explanation: (CH3)2CHNHCH3 is N, N-dimethyl-ethylamine, which is a secondary amine with two alkyl groups bonded to the nitrogen atom.
Which of the following reactions is characteristic of primary aromatic amines? a) Nitrosation b) Nitration c) Acetylation d) Oxidation
Answer: a) Nitrosation
Explanation: Nitrosation is a characteristic reaction of primary aromatic amines, where they react with nitrous acid to form diazonium salts.
The compound C6H5N(CH3)2 is an example of a: a) Primary amine b) Secondary amine c) Tertiary amine d) Quaternary ammonium salt
Answer: b) Secondary amine
Explanation: C6H5N(CH3)2 is N,N-dimethylaniline, which is a secondary amine with one alkyl group and one aryl group bonded to the nitrogen atom.
We hope there JEE MCQ of Class 12 Amines will help you to score an excellent rank in JEE Mains and Advanced. If you have any queries feel free to write in the comments section. We at Study Rate are always ready to serve our students.
