JEE Chemistry

Aldehydes & Ketones: JEE Questions & Solutions

45 previous-year JEE Chemistry questions on Aldehydes & Ketones, each with a worked step-by-step solution.

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Previous-year questions

  1. 01An organic compound "P" of molecular formula C₆H₁₂O₃ gives positive Iodoform test but negative Tollen's test. When "P" is treated with…MCQMediumJEE 2026
  2. 02Match List - I with List - II. | List - I (Reagents) | List - II (Reaction Name, involving aldehydes) | | --- | --- | | A. H₂, Pd-BaSO₄ |…MCQEasyJEE 2026
  3. 03Match the LIST-I with LIST-II | LIST-I (Reagents) | LIST-II (Name of reaction involving carbonyl compounds) | |---|---| | (A) NH₂-NH₂, KOH…MCQEasyJEE 2026
  4. 04The compound A, C₈H₈O₂, reacts with acetophenone to form a single product via cross-aldol condensation. The compound A on reaction with…MCQMediumJEE 2026
  5. 05'x' is the product which is obtained from propanenitrile and stannous chloride in the presence of hydrochloric acid followed by hydrolysis.…MCQMediumJEE 2026
  6. 06Which of the following statements are TRUE about Haloform reaction?: A. Sodium hypochlorite reacts with KI to give KOI. B. KOI is a…MCQMediumJEE 2026
  7. 07Iodoform test can differentiate between A. Methanol and Ethanol B. CH₃COOH and CH₃CH₂COOH C. Cyclohexene and cyclohexanone D. Diethyl ether…MCQMediumJEE 2026
  8. 08A student is given one compound among the following compounds that gives positive test with Tollen's reagent. The compound is:MCQMediumJEE 2026
  9. 09Given below are two statements: Statement I: Cross aldol condensation between two different aldehydes will always produce four different…MCQMediumJEE 2026
  10. 10The unsaturated ether on acidic hydrolysis produces carbonyl compounds as shown below: CH₃-CH=CH-O-CH=CH₂ → H₃O⁺ CH₃-CH₂-CH=O and O=CH-CH₃…MCQEasyJEE 2026
  11. 11Consider the following reactions giving major product. Identify the correct reaction.MCQMediumJEE 2026
  12. 12Given below are the four isomeric compounds P, Q, R, S: P: Aromatic compound containing an -OH group Q: Aromatic compound containing an…MCQMediumJEE 2026
  13. 13The compounds which give positive Fehling's test are: Choose the CORRECT answer from the options given below:MCQEasyJEE 2025
  14. 14Propanal, CH₃CH₂CH=O, is refluxed with excess HCHO in the presence of alkali. The major product of this reaction is:MCQMediumJEE 2025
  15. 15Given below are two statements: Statement (I): In the case of formaldehyde, K is about 2280, due to small substituents, hydration is…MCQEasyJEE 2025
  16. 16Which of the following arrangements with respect to their reactivity in nucleophilic addition reaction is correct?MCQEasyJEE 2025
  17. 17Aman has been asked to synthesise the molecule x, 1-(cyclopent-1-en-1-yl)ethan-1-one, in which an acetyl group -CO-CH₃ is attached to C-1…MCQHardJEE 2025
  18. 18The product (A) formed in the following reaction sequence is:MCQMediumJEE 2025
  19. 19Match List - I with List - II. | List - I | List - II | |---|---| | (A) RCN → [ (ii) H₃O⁺](i) SnCl₂, HCl RCHO | (I) Etard reaction | | (B)…MCQMediumJEE 2025
  20. 20Both acetaldehyde and acetone (individually) undergo which of the following reactions? A. Iodoform Reaction B. Cannizzaro Reaction C. Aldol…MCQEasyJEE 2025
  21. 21The product (P) formed in the following reaction is:MCQEasyJEE 2025
  22. 22Given below are two statements: Statement I: Vanillin will react with NaOH and also with Tollen’s reagent. Statement II: Vanillin will…MCQEasyJEE 2025
  23. 23The major product (P) in the following reaction is:MCQMediumJEE 2025
  24. 24Aldol condensation is a popular and classical method to prepare α, β-unsaturated carbonyl compounds. This reaction can be both…MCQMediumJEE 2025
  25. 25An organic compound (X) with molecular formula C₃ H₆ O is not readily oxidised. On reduction it gives C₃ H₈ O (Y) which reacts with HBr to…MCQMediumJEE 2025
  26. 26"P" is an optically active compound with molecular formula C₆H₁₂O. When "P" is treated with 2,4-dinitrophenylhydrazine, it gives a positive…MCQMediumJEE 2025
  27. 27Identify the structure of the final product (D) in the following sequence of the reactions: Total number of sp² hybridised carbon atoms in…NVAMediumJEE 2025
  28. 28When undergoes intramolecular aldol condensation, the major product formed is:MCQMediumJEE 2025
  29. 29The compound formed by the reaction of ethanol with semicarbazide contains number of nitrogen atoms.NVAEasyJEE 2024
  30. 30m-Chlorobenzaldehyde on treatment with 50% KOH solution yields:MCQEasyJEE 2024
  31. 31Identify the reagents A, B and C used for the following conversion: The starting material is a cyclohexane ring carrying a -CH₂COOCH₃ group…MCQEasyJEE 2024
  32. 32In the given reactions, identify the reagent A and reagent B: C₆H₅-CH₃ → [ 273-283 K ] A + (CH₃CO)₂O [Intermediate] → H₃O⁺ C₆H₅-CHO…MCQEasyJEE 2024
  33. 33Which of the following compounds can give a positive iodoform test when treated with aqueous KOH solution followed by potassium hypoiodite?MCQEasyJEE 2024
  34. 34Which of the following compounds will give a silver mirror with ammoniacal silver nitrate? Statements: (A) Formic Acid (B) Formaldehyde (C)…NVAEasyJEE 2024
  35. 35Given below are two statements: Statement I: H₂N-CO-CH₂-CH₂-CO-CH₃ (4-oxopentanamide) under Clemmensen reduction conditions will give…MCQEasyJEE 2023
  36. 36A trisubstituted compound ‘A’, C₁₀H₁₂O₂, gives neutral FeCl₃ test positive. Treatment of compound ‘A’ with NaOH and CH₃Br gives C₁₁H₁₄O₂,…NVAMediumJEE 2023
  37. 37Cyclohexylamine when treated with nitrous acid yields (P). On treating (P) with PCC results in (Q). When (Q) is heated with dilute NaOH, we…MCQMediumJEE 2023
  38. 38The number of molecules which gives halform test among the following molecules is:NVAMediumJEE 2023
  39. 39Number of isomeric compounds with molecular formula C₉H₁₀O which (i) do not dissolve in NaOH (ii) do not dissolve in HCl. (iii) do not give…NVAMediumJEE 2023
  40. 40The structures of the major products A, B and C in the following reaction sequence are: CH₃CH₂CH₂CH(CH₃)CHO → [ NaCN, H₂O]NaHSO₃, dil. HCl…MCQMediumJEE 2023
  41. 41Find out the major product from the following reaction:MCQMediumJEE 2023
  42. 42In the reaction given below: The product ‘X’ is:MCQMediumJEE 2023
  43. 43Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: can be subjected to…MCQEasyJEE 2023
  44. 44The major product formed in the following reaction is.MCQMediumJEE 2023
  45. 45The value of x in compound D isNVAHardJEE 2023

Frequently asked questions

Our bank has 45 previous-year JEE Chemistry questions tagged to Aldehydes & Ketones, drawn from JEE papers between 2023 and 2026, including 12 from 2026 alone. Each comes with a full step-by-step solution.

Aldehydes & Ketones is rated Advanced overall for JEE Chemistry. The PYQs on this page break down as 26 medium, 17 easy, 2 hard.

Of the 45 previous-year questions on Aldehydes & Ketones, 38 are multiple-choice (MCQ) and 7 are numerical-value (NVA) questions.

Based on recent paper analysis, Aldehydes & Ketones is worth about 3 marks in JEE Main. It sits in Organic Compounds containing Oxygen, a Class 12 Chemistry chapter.

More Organic Compounds containing Oxygen topics

Phenols19Alcohols16Carboxylic Acids16Ethers6

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