Q42.Match the organic compounds in column - I with the Lassaigne's test result in column - II appropriately: Column – I Column - II A. Aniline i. Red colour with FeCl3 B. Benzene sulfonic acid ii. Violet color with sodium nitroprusside C. Thiourea iii. Blue color with and acidic solution of FeSO4 (1) A - ii ; B - iii ; C - i (2) A - iii ; B - ii ; C - i (3) A - ii ; B - i ; C - iii (4) A - iii ; B - i ; C - ii
What This Question Tests
This question tests the knowledge of Lassaigne's test for the qualitative detection of nitrogen and sulfur in organic compounds, requiring matching specific compounds with their characteristic test results.
Concepts Tested
📚 NCERT Sections This Tests
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
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.
9.8 — Accomplish The Following Conversions:
Chemistry Class 12 · Chapter 9
9.8 Accomplish the following conversions: (i) Nitrobenzene to benzoic acid (ii) Benzene to m-bromophenol (iii) Benzoic acid to aniline (iv) Aniline to 2,4,6-tribromofluorobenzene (v) Benzyl chloride to 2-phenylethanamine (vi) Chlorobenzene to p-chloroaniline (vii) Aniline to p-bromoaniline (viii) Benzamide to toluene (ix) Aniline to benzyl alcohol.
📋 Question Details
- Chapter
- Organic Chemistry - Some Basic Principles and Techniques
- Topic
- Qualitative Analysis (Lassaigne's Test)
- Year
- 2015
- Shift
- 11 Apr Online
- Q Number
- Q42
- Type
- MCQ
- NCERT Ref
- Class 11 Chemistry Ch 12: Organic Chemistry - Some Basic Principles and Techniques
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