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Amines — NEET 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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Questions

How many NEET 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 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.