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Alcohols, Phenols and Ethers

JEE Main 2024 (Online) 1st February Evening ShiftMCQEasy📈 Topic in 5% papers+4−1
Ques. 1JEE Main 2024, 1 February (Evening Shift)

Which among the following has highest boiling point?

  1. CH3CH2CH2CH2-OH
  2. CH3CH2CH2CH3
  3. CH3CH2CH2CHO
  4. H5C2-O-C2H5

Answer

(1) CH3CH2CH2CH2-OH

Solution

Molar masses are comparable (58–74), so the boiling point is decided by the intermolecular forces:

(A) Butan-1-ol: intermolecular H-bonding through –OH ⇒ (A) has the strongest attraction

(B) Butane: only weak van der Waals (London) forces ⇒ (B) boils lowest

(C) Butanal: dipole–dipole forces, no H-bonding ⇒ (C) is lower than the alcohol

(D) Diethyl ether: weak dipole–dipole forces, no H-bonding ⇒ (D) is also lower

b.p.: butan-1-ol (391 K) > butanal (348 K) > diethyl ether (308 K) > butane (273 K)

∵ H-bonding is the strongest of these forces, the alcohol has the highest boiling point.

Answer: (1)

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, 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. 4JEE 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. 5JEE 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. 6JEE 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. 7JEE 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. 8JEE 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. 9JEE 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. 10JEE 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. 11JEE 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]

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