Aldehydes, Ketones & Acids · JEE Main previous year questions

2026 6 questions

1. Q672026 · 2 Apr 2026 · Shift 1

   Match List - I with List - II. $$\begin{array}{llll}& \text{List - I}& & \text{List - II}\\ & \text{Mixture of Compounds}& & \text{Reagent used to distinguish}\\ \text{A.}& \text{Diethyl amine}+\text{Ethyl amine}& \text{I.}& \text{Bromine water}\\ \text{B.}& \text{Acetaldehyde}+\text{Acetone}& \text{II.}& \mathrm{CHC}{\mathrm{l}}_3+\mathrm{KOH},\mathrm{\Delta }\\ \text{C.}& \text{Ethanol}+\text{Phenol}& \text{III.}& \text{Neutral }\mathrm{FeC}{\mathrm{l}}_3\\ \text{D.}& \text{Benzoic acid}+\text{Cinnamic acid}& \text{IV.}& \text{Ammonical silver nitrate}\end{array}$$ Choose the correct answer from the options given below :

   1. A.A-IV, B-II, C-I, D-III
   2. B.A-IV, B-II, C-III, D-I
   3. C.A-II, B-IV, C-I, D-III
   4. D.A-II, B-IV, C-III, D-I
   Show answer

   Answer: D

2. Q652026 · 24 Jan 2026 · Shift 1
   
   1. A.B
   2. B.D
   3. C.A
   4. D.C
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   Answer: D

3. Q612026 · 23 Jan 2026 · Shift 1
   
   1. A.A and D
   2. B.A and B
   3. C.B and D
   4. D.B and C
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   Answer: D

4. Q512026 · 23 Jan 2026 · Shift 2
   
   1. A.A, B & C Only
   2. B.A, C & E Only
   3. C.B, D & E Only
   4. D.A & C Only
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   Answer: D

5. Q632026 · 22 Jan 2026 · Shift 1

   Match the LIST-I with LIST-II $$\begin{array}{llll}& \text{List-I Reagents}& & \text{List-II Name of Reaction involving carbonyl compounds}\\ \text{A.}& N{H}_2-N{H}_2,KOH& \text{I.}& \text{Tollen’s Test}\\ \text{B.}& Ag(N{H}_3{)}_{2}OH& \text{II.}& \text{Clemmensen Reduction}\\ \text{C.}& \text{Aq. }CuS{O}_4\text{, Sodium Potassium tartrate, KOH}& \text{III.}& \text{Wolff - Kishner Reduction}\\ \text{D.}& Zn-Hg,HCl& \text{IV.}& \text{Fehling’s Test}\end{array}$$ Choose the correct answer from the options given below :

   1. A.A-IV, B-III, C-II, D-I
   2. B.A-III, B-I, C-IV, D-II
   3. C.A-II, B-I, C-IV, D-III
   4. D.A-III, B-IV, C-I, D-II
   Show answer

   Answer: B

6. Q512026 · 21 Jan 2026 · Shift 2

   Match List - I with List - II. $$\begin{array}{ll}\text{List – I (Reagents)}& \text{List – II (Reaction Name (Involving aldehydes))}\\ \text{A. }{\mathrm{H}}_2,Pd–BaS{\mathrm{O}}_4& \text{I. Etard Reaction}\\ \text{B. }\mathrm{SnC}{\mathrm{l}}_2,\mathrm{HCl}& \text{II. Rosenmund Reduction}\\ \text{C. }\mathrm{Cr}{\mathrm{O}}_2\mathrm{C}{\mathrm{l}}_2,\mathrm{C}{\mathrm{S}}_2& \text{III. Gattermann–Koch Reaction}\\ \text{D. }\mathrm{CO},\mathrm{HCl},Anhyd.\mathrm{AlC}{\mathrm{l}}_3& \text{IV. Stephen Reaction}\end{array}$$ Choose the correct answer from the options given below :

   1. A.A-II, B-III, C-IV, D-I
   2. B.A-IV, B-III, C-I, D-II
   3. C.A-IV, B-I, C-II, D-III
   4. D.A-II, B-IV, C-I, D-III
   Show answer

   Answer: D