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Aldehydes, Ketones and Carboxylic Acids

JEE Main 2025 (Online) 22nd January Morning ShiftMCQMedium📈 Topic in 13% papers+4−1
Ques. 1JEE Main 2025, 22 January (Morning Shift)

The compounds which give positive Fehling's test are : Choose the correct answer from the options given below :

  1. A, C and D Only
  2. A, B and C Only
  3. A, D and E Only
  4. C, D and E Only

Answer

(4) C, D and E Only

Solution

A (aromatic aldehyde) and B (ketone) negative.

C is an -hydroxy ketone (fructose): in alkali it goes through the enediol to an aldose positive.

[figure]

D (CH3CHO) and E (C6H5CH2CHO) are aliphatic aldehydes positive.

C, D and E.

Answer: (4)

Keep practising — Aldehydes, Ketones and Carboxylic Acids

Ques. 2JEE Main 2025, 22 January (Evening Shift)

[figure] Residue (A) + HCl (dil) Compound (B) Structure of residue (A) and compound (B) formed respectively is :

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]

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