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Alcohols, Phenols and Ethers

JEE Main 2024 (Online) 6th April Morning ShiftMCQEasy📈 Topic in 22% papers+4−1
Ques. 1JEE Main 2024, 6 April (Morning Shift)

In Reimer - Tiemann reaction, phenol is converted into salicylaldehyde through an intermediate. The structure of intermediate is .

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

Answer

(2) [figure]

Solution

CHCl3 NaOH :CCl2 (dichlorocarbene, electrophile); phenol NaOH sodium phenoxide

∵ the phenoxide ring is strongly activated, :CCl2 attacks the ortho position ⇒ o-dichloromethyl phenoxide (intermediate):

[figure]

∴ hydrolysis of –CHCl2 by NaOH gives –CHO; acidification gives salicylaldehyde.

Answer: (2)

Keep practising — Alcohols, Phenols and Ethers

Ques. 2JEE Main 2024, 6 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. Statement I is incorrect but Statement II is correct
  2. Both Statement I and Statement II are incorrect
  3. Both Statement I and Statement II are correct
  4. Statement I is correct but Statement II is incorrect
Ques. 3JEE Main 2024, 6 April (Evening Shift)

Identify the product A in the following reaction. [figure]

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

The major products formed : [figure] A and B respectively are :

  1. [figure]
  2. [figure]
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  4. [figure]
Ques. 5JEE Main 2024, 6 April (Evening Shift)

[figure] The ratio of number of oxygen atoms to bromine atoms in the product Q is 10-1.

Ques. 6JEE Main 2024, 5 April (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. Statement I is false but Statement II is true
  4. Both Statement I and Statement II are false
Ques. 7JEE Main 2024, 5 April (Morning Shift)

Identify compound (Z) in the following reaction sequence. [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 8JEE Main 2024, 5 April (Morning Shift)

Consider the given chemical reaction sequence : [figure] Total sum of oxygen atoms in Product A and Product B is .

Ques. 9JEE Main 2024, 5 April (Evening Shift)

Which one of the following reactions is NOT possible?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 10JEE Main 2024, 4 April (Evening Shift)

CH3-CH2-CH2-Br + NaOH C2H5OH Product 'A' [figure] Consider the above reactions, identify product B and product C.

  1. B = C = 1-Propanol
  2. B = 1-Propanol C = 2-Propanol
  3. B = C = 2-Propanol
  4. B = 2-Propanol C = 1-Propanol
Ques. 11JEE Main 2024, 4 April (Evening Shift)

Common name of Benzene - 1,2 - diol is -

  1. catechol
  2. quinol
  3. o-cresol
  4. resorcinol

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