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Aldehydes, Ketones and Carboxylic Acids

NEET (UG) 2025MCQMedium📈 Topic in 38% papers+4−1
Ques. 1NEET (UG) 2025

The major product of the following reaction is [figure]

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

Answer

(4) [figure]

Solution

Excess CH3MgBr attacks both electrophilic groups.

Ketone group: CH3 adds to the carbonyl carbon alkoxide -C(OMgBr)(CH3)- H3O+ tertiary alcohol C6H5-C(OH)(CH3)-.

Nitrile group: as per NCERT, nitriles with Grignard reagent give an imine salt -C(CH3)=NMgBr (no further addition) H3O+ ketone -COCH3.

Product: C6H5C(OH)(CH3)CH2CH2COCH3 (5-hydroxy-5-phenylhexan-2-one), i.e. option (4).

Answer: (4)

Keep practising — Aldehydes, Ketones and Carboxylic Acids

Ques. 2NEET (UG) 2024

Match List-I with List-II and choose the correct option.

  1. A-II, B-IV, C-I, D-III
  2. A-I, B-II, C-III, D-IV
  3. A-IV, B-III, C-II, D-I
  4. A-II, B-I, C-IV, D-III
Ques. 3NEET (UG) 2024

Identify the correct reagents that would bring about the following transformation. [figure]

  1. (i) H2O/H+, (ii) CrO3
  2. (i) BH3, (ii) H2O2/OH , (iii) PCC
  3. (i) BH3, (ii) H2O2/OH , (iii) alk. KMnO4
  4. (i) H2O/H+, (ii) PCC
Ques. 4NEET (UG) 2024

Fehling's solution 'A' is

  1. aqueous copper sulphate
  2. alkaline copper sulphate
  3. alkaline solution of sodium potassium tartrate (Rochelle's salt)
  4. aqueous sodium citrate
Ques. 5NEET (UG) 2024

Match List I with List II. Choose the correct answer from the options given below:

  1. A-IV, B-I, C-III, D-II
  2. A-III, B-I, C-II, D-IV
  3. A-IV, B-I, C-II, D-III
  4. A-I, B-IV, C-II, D-III
Ques. 6RE-NEET (UG) 2024

Select the incorrect reaction among the following :

  1. CH3COCl [ ]H2O CH3COOH
  2. [figure]
  3. CH3CH2OH [(ii) H3O ](i) KMnO4/OH- CH3COOH
  4. CH3CH2CH2OH CrO3-H2SO4 CH3CH2COOH
Ques. 7NEET (UG) 2023

Identify product (A) in the following reaction : [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 8NEET (UG) 2023

Complete the following reaction: [figure] [C] is .

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 9NEET (UG) 2023

Identify the major product obtained in the following reaction: [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 10NEET (UG) 2022

Given below are two statements : In the light of the above statements, choose the most appropriate answer from the options given below

  1. Both Statement I and Statement II are correct
  2. Both Statement I and Statement II are incorrect
  3. Statement I is correct but Statement II is incorrect
  4. Statement I is incorrect but Statement II is correct
Ques. 11NEET (UG) 2022

RMgX + CO2 [ether]dry Y H3O+ RCOOH What is Y in the above reaction?

  1. RCOO-Mg+X
  2. R3CO-Mg+X
  3. RCOO-X+
  4. (RCOO)2Mg

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