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Aldehydes, Ketones and Carboxylic Acids · Question 12

RE-NEET (UG) 2024MCQMedium📈 Topic in 50% papers+4−1
1

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

Answer

(2) [figure]

Solution

(1) Acid chlorides are hydrolysed by water to carboxylic acids: CH3COCl + H2O CH3COOH + HCl → correct.

(2) LiAlH4 reduces an amide to an amine, not to an acid:

C6H5CONH2 [(ii) H2O](i) LiAlH4 C6H5CH2NH2 → incorrect.

(3) Primary alcohols are oxidised by alkaline KMnO4, followed by acidification, to carboxylic acids → correct.

(4) Jones reagent (CrO3-H2SO4) oxidises a primary alcohol to the carboxylic acid → correct.

Answer: (2)

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Keep practising — Aldehydes, Ketones and Carboxylic Acids

2

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

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

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

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

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

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
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5

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
NEET (UG) 2022
6

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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7

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

  1. (a) - (iii), (b) - (iv), (c) - (ii), (d) - (i)
  2. (a) - (ii), (b) - (iii), (c) - (iv), (d) - (i)
  3. (a) - (i), (b) - (iii), (c) - (ii), (d) - (iv)
  4. (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
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8

Which one of the following is not formed when acetone reacts with 2-pentanone in the presence of dilute NaOH followed by heating?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
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9

Which of the following reactions is not an example for nucleophilic addition-elimination reaction?

  1. CH3CHO + NH3 CH3CH=NH + H2O
  2. CH3CHO + NaHSO3 CH3- H | OH |C-SO3Na
  3. CH3CHO + NH2OH CH3CH=N-OH + H2O
  4. CH3CHO + C6H5NHNH2 CH3CH=N-NHC6H5 + H2O
NEET (UG) 2022 (Phase 2)
10

The product formed from the following reaction sequence is [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
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11

The products A and B in the following reaction sequence are : [figure]

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