Q57.A compound 'X' on treatment with Br /NaOH, provided C3H9 N, which gives positive carbylamine test. Compound X′ is: (1) CH3COCH2NHCH3 (2) CH3CH2COCH2NH2 (3) CH3CH2CH2CONH2 (4) CH3CON(CH3)2
What This Question Tests
This question combines the Hofmann bromamide degradation reaction with the carbylamine test to identify the original amide, requiring knowledge of reaction products and characteristic tests for amines.
Concepts Tested
Formulas Used
RCONH2 + Br2 + 4NaOH → RNH2 + Na2CO3 + 2NaBr + 2H2O
RNH2 + CHCl3 + 3KOH → RNC + 3KCl + 3H2O
📚 NCERT Sections This Tests
9.5 — How Will You Convert:
Chemistry Class 12 · Chapter 9
9.5 How will you convert: (i) Ethanoic acid into methanamine (ii) Hexanenitrile into 1-aminopentane (iii) Methanol to ethanoic acid (iv) Ethanamine into methanamine (v) Ethanoic acid into propanoic acid (vi) Methanamine into ethanamine (vii) Nitromethane into dimethylamine (viii) Propanoic acid into ethanoic acid? 9.6 Describe a method for the identification of primary, secondary and tertiary amines. Also write chemical equations of the reactions involved.
9.7 — Write Short Notes On The Following:
Chemistry Class 12 · Chapter 9
9.7 Write short notes on the following: (i) Carbylamine reaction (ii) Diazotisation (iii) Hofmann’s bromamide reaction (iv) Coupling reaction (v) Ammonolysis (vi) Acetylation (vii) Gabriel phthalimide synthesis.
9.9 — Give The Structures Of A, B And C In The Following Reactions:
Chemistry Class 12 · Chapter 9
9.9 Give the structures of A, B and C in the following reactions: B NaOH Br 2 C (i) CH 3 CH 2 I NaCN A Partial OHhydrolysis CuCN H 2 O/H NH 3 (ii) C 6 H 5 N 2 Cl A B C 4 B HNO 2 C (iii) CH 3 CH 2 Br KCN A LiAlH 0 C 2 2 O/H HCl B H C (iv) C6 H 5 NO 2 Fe/HCl A NaNO273 K 3 A NaOBr B NaNO 2 /HCl C (v) CH 3 COOH NH 2 B C 6 H 5 OH C (vi) C6 H 5 NO 2 Fe/HCl A HNO273K 279 Amines Reprint 2025-26
📋 Question Details
- Chapter
- Nitrogen Compounds
- Topic
- Hofmann bromamide degradation
- Year
- 2019
- Shift
- 11 Jan Shift 2
- Q Number
- Q57
- Type
- MCQ
- NCERT Ref
- Class 12 Chemistry Ch 13: Amines
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