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Amines — NEET & JEE Chemistry MCQs

30 questions written by hand against the NCERT chapter. Every wrong option is explained, not just the right one.

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Sample questions from this chapter

How is (CH3)2NH classified?
  1. Secondary amine ✓
  2. Primary amine
  3. Tertiary amine
  4. Quaternary ammonium salt
Answer: A. Two methyl groups and one hydrogen are bonded to nitrogen, so dimethylamine is secondary. Counting the two carbon atoms as two separate primary groups is the classification trap.
Why not B: A primary amine has only one carbon group bonded to nitrogen.
Why not C: A tertiary amine has three carbon groups bonded to nitrogen.
Why not D: A quaternary ammonium ion has four carbon groups and a positive charge.
Which basicity order is generally observed for ethylamines in aqueous solution?
  1. C2H5NH2 > (C2H5)2NH > (C2H5)3N > NH3
  2. NH3 > C2H5NH2 > (C2H5)2NH > (C2H5)3N
  3. (C2H5)2NH > (C2H5)3N > C2H5NH2 > NH3 ✓
  4. (C2H5)3N > (C2H5)2NH > C2H5NH2 > NH3
Answer: C. For ethylamines, electron donation and hydration together give 2° > 3° > 1° > NH3 in water. Choosing the tertiary amine first applies only the gas-phase inductive trend.
Why not A: It underweights the +I effect and favourable solvation of the dialkylammonium ion.
Why not B: Ethyl groups increase electron density, so ammonia is not the strongest base here.
Why not D: The tertiary conjugate acid is less effectively solvated than the secondary one in water.
What primary amine is obtained when butanamide undergoes Hoffmann bromamide reaction?
  1. Propan-1-amine ✓
  2. Butan-1-amine
  3. Butan-2-amine
  4. Pentan-1-amine
Answer: A. CH3CH2CH2CONH2 rearranges to CH3CH2CH2NH2, so the four-carbon amide yields a three-carbon amine. Butan-1-amine is the one-carbon bookkeeping trap.
Why not B: This incorrectly retains the carbonyl carbon of the amide.
Why not C: The straight propyl group does not rearrange into a secondary butyl skeleton.
Why not D: The reaction removes one carbon rather than adding one.

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Other NEET Chemistry chapters

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Questions

How many NEET and JEE questions are there on Amines?

This chapter test has 30 questions — 10 easy, 14 medium and 6 hard — all written against the NCERT Class 12 chapter.

Is this NEET and JEE Chemistry chapter test free?

Yes. Every chapter test is free with no login, and you get your all-India rank on every one. Nothing on the site is on sale right now.

Do the questions explain the wrong options?

Yes — every distractor carries its own explanation naming the specific misconception that makes a student pick it. That is the part most question banks skip, and it is the part that changes your next attempt.