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Alcohols, Phenols and Ethers

JEE Main 2024 (Online) 31st January Morning ShiftMCQEasy📈 Topic in 12% papers+4−1
Ques. 1JEE Main 2024, 31 January (Morning Shift)

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: In the light of the above statements, choose the correct answer from the options given below:

  1. A is false but R is true.
  2. Both A and R are true but R is NOT the correct explanation of A.
  3. Both A and R are true and R is the correct explanation of A.
  4. A is true but R is false.

Answer

(2) Both A and R are true but R is NOT the correct explanation of A.

Solution

As nucleophile: O–H bond breaks; the O of R–OH attacks an electrophile, e.g. R-OH + R'COOH H+ R'COOR + H2O

As electrophile: C–O bond breaks; protonated alcohol R- OH2 is attacked by a nucleophile, e.g. R-OH + HBr R-Br + H2O

⇒ A is true

2R-OH + 2Na 2R-ONa + H2 ⇒ R is true

∵ R shows the acidic nature of alcohols, not their nucleophilic / electrophilic behaviour ⇒ R does not explain A

Answer: (2)

Keep practising — Alcohols, Phenols and Ethers

Ques. 2JEE Main 2024, 31 January (Morning Shift)

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: In the light of the above statements, choose the correct answer from the options given below:

  1. A is false but R is true.
  2. Both A and R are true but R is NOT the correct explanation of A.
  3. Both A and R are true and R is the correct explanation of A.
  4. A is true but R is false.
Ques. 3JEE Main 2024, 30 January (Evening Shift)

Salicylaldehyde is synthesized from phenol, when reacted with

  1. HCCl3, NaOH
  2. CO2, NaOH
  3. [figure]
  4. CCl4, NaOH
Ques. 4JEE Main 2024, 30 January (Evening Shift)

Products A and B formed in the following set of reactions are [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 5JEE Main 2024, 29 January (Morning Shift)

The major product(P) in the following reaction is [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 6JEE Main 2024, 29 January (Evening Shift)

Phenol treated with chloroform in presence of sodium hydroxide, which further hydrolyzed in presence of an acid results

  1. Salicylic acid
  2. Benzene-1,2-diol
  3. 2-Hydroxybenzaldehyde
  4. Benzene-1,3-diol
Ques. 7JEE Main 2024, 29 January (Evening Shift)

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

  1. A-I, B-II, C-III, D-IV
  2. A-IV, B-I, C-II, D-III
  3. A-II, B-I, C-IV, D-III
  4. A-III, B-IV, C-I, D-II
Ques. 8JEE Main 2024, 27 January (Morning Shift)

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

  1. Statement I is true but Statement II is false
  2. Both Statement I and Statement II are true
  3. Both Statement I and Statement II are false
  4. Statement I is false but Statement II is true
Ques. 9JEE Main 2024, 27 January (Morning Shift)

The ascending order of acidity of -OH group in the following compounds is : [figure] Choose the correct answer from the options given below:

  1. (A) < (D) < (C) < (B) < (E)
  2. (C) < (A) < (D) < (B) < (E)
  3. (C) < (D) < (B) < (A) < (E)
  4. (A) < (C) < (D) < (B) < (E)
Ques. 10JEE Main 2024, 27 January (Evening Shift)

Major product formed in the following reaction is a mixture of : [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 11JEE Main 2024, 27 January (Evening Shift)

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

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

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