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Aldehydes, Ketones and Carboxylic Acids

JEE Main 2024 (Online) 5th April Evening ShiftNumericalMedium📈 Topic in 5% papers+4
Ques. 1JEE Main 2024, 5 April (Evening Shift)

The product C in the following sequence of reactions has bonds. [figure]

Answer

4

Solution

[figure]

A = potassium benzoate, B = benzoic acid, C = m-bromobenzoic acid

∵ hot alkaline KMnO4 oxidises the whole side chain (benzylic H present) to –COOK; –COOH is meta-directing, so Br enters meta

bonds in C = 3 (ring C=C) + 1 (C=O) = 4

Answer: 4

Keep practising — Aldehydes, Ketones and Carboxylic Acids

Ques. 2JEE Main 2024, 5 April (Evening Shift)

In the Claisen-Schmidt reaction to prepare 351 g of dibenzalacetone using 87 g of acetone, the amount of benzaldehyde required is g. (Nearest integer)

Ques. 3JEE Main 2024, 4 April (Morning Shift)

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 incorrect
  2. Statement I is correct but Statement II is incorrect
  3. Both Statement I and Statement II are correct
  4. Statement I is incorrect but Statement II is correct
Ques. 4JEE Main 2024, 4 April (Morning Shift)

Identify the product in the following reaction: [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 5JEE Main 2024, 4 April (Morning Shift)

The number of the correct reaction(s) among the following is . [figure]

Ques. 6JEE Main 2024, 4 April (Evening Shift)

[figure] In the above chemical reaction sequence "A" and "B" respectively are

  1. H2O, H+ and NaOH(alc)/I2
  2. O3, Zn/H2O and KMnO4
  3. H2O, H+ and KMnO4
  4. O3, Zn/H2O and NaOH(alc)/I2
Ques. 7JEE Main 2024, 1 February (Morning Shift)

Identify A and B in the following sequence of reaction [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 8JEE Main 2024, 1 February (Morning Shift)

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)-(IV), (B)-(II), (C)-(III), (D)-(I)
  3. (A)-(IV), (B)-(II), (C)-(I), (D)-(III)
  4. (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
Ques. 9JEE Main 2024, 1 February (Evening Shift)

[figure] Acid D formed in above reaction is :

  1. Malonic acid
  2. Oxalic acid
  3. Succinic acid
  4. Gluconic acid
Ques. 10JEE Main 2024, 31 January (Morning Shift)

The product of the following reaction is P. [figure] The number of hydroxyl groups present in the product P is .

Ques. 11JEE Main 2024, 31 January (Evening Shift)

Identify major product 'P' formed in the following reaction. [figure]

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

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