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Alcohols, Phenols and Ethers

JEE Main 2026 (Online) 28th January Morning ShiftMCQMedium📈 Topic in 13% papers+4−1
Ques. 1JEE Main 2026, 28 January (Morning Shift)

Consider the following reaction sequence : [figure] Compound (y) develops characteristic colour with neutral FeCl3 solution. Identify the INCORRECT statement from the following for the above sequence.

  1. Compound y will dissolve in NaHCO3 and evolve a gas.
  2. Compound x is more acidic than compound y.
  3. Both compounds x and y will dissolve in NaOH.
  4. Both compounds x and y will burn with sooty flame.

Answer

(2) Compound x is more acidic than compound y.

Solution

Compound x: C = 76.6 %, H = 6.38 %, O = 100 − 76.6 − 6.38 = 17.02 %

Moles: C = 76.612 = 6.38, H = 6.381 = 6.38, O = 17.0216 = 1.06

Ratio C : H : O = 6 : 6 : 1 empirical formula C6H6O (mass 94)

Molar mass = 2 × vapour density = 2 × 47 = 94 molecular formula C6H6O, i.e. phenol (x).

Kolbe's reaction: sodium phenoxide with CO2 (high pressure), followed by acidification, gives salicylic acid (y), which has a phenolic –OH and therefore gives a violet colour with neutral FeCl3:

[figure]

(1) Salicylic acid has a –COOH group, so it dissolves in NaHCO3 with evolution of CO2. Correct.

(2) Salicylic acid (a carboxylic acid, pKa ≈ 3) is much more acidic than phenol (pKa ≈ 10). So 'x is more acidic than y' is INCORRECT.

(3) Both phenol and salicylic acid are acidic enough to dissolve in NaOH. Correct.

(4) Both are aromatic compounds (high C : H ratio) and burn with a sooty flame. Correct.

Answer: (2)

Keep practising — Alcohols, Phenols and Ethers

Ques. 2JEE Main 2026, 24 January (Morning Shift)

Consider the following two reactions A and B. [figure] Numerical value of [molar mass of x + molar mass of y] is

  1. 46
  2. 160
  3. 88
  4. 4
Ques. 3JEE Main 2026, 24 January (Morning Shift)

A hydroxy compound (X) with molar mass 122 g mol-1 is acetylated with acetic anhydride, using a large excess of the reagent ensuring complete acetylation of all hydroxyl groups. The product obtained has a molar mass of 290 g mol-1. The number of hydroxyl groups present in compound (X) is:

  1. 2
  2. 4
  3. 3
  4. 5
Ques. 4JEE Main 2026, 24 January (Evening Shift)

From the following, how many compounds contain at least one secondary alcohol? [figure] Choose the correct answer from the options given below :

  1. Three
  2. Two
  3. Four
  4. Five
Ques. 5JEE Main 2026, 23 January (Evening Shift)

A mixed ether (P), when heated with excess of hot concentrated hydrogen iodide produces two different alkyl iodides which when treated with aq. NaOH give compounds (Q) and (R). Both (Q) and (R) give yellow precipitate with NaOI. Identify the mixed ether (P) :

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 6JEE Main 2026, 22 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. 7JEE Main 2026, 22 January (Evening Shift)

3,3-Dimethyl-2-butanol cannot be prepared by : Choose the correct answer from the options given below :

  1. B and E Only
  2. B, C and E Only
  3. B and C Only
  4. B Only
Ques. 8JEE Main 2025, 8 April (Evening Shift)

Which one of the following reactions will not lead to the desired ether formation in major proportion? (iso-Bu isobutyl, sec-Bu sec-butyl, n-Pr n-propyl, tBu tert-butyl, Et ethyl)

  1. [figure]
  2. iso-Bu O Na + sec-BuBr sec-Bu–O–iso-Bu
  3. [figure]
  4. tBu O Na + EtBr tBu-O-Et
Ques. 9JEE Main 2025, 7 April (Morning Shift)

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

  1. Statement I is false but Statement II is true
  2. Statement I is true but Statement II is false
  3. Both Statement I and Statement II are true
  4. Both Statement I and Statement II are false
Ques. 10JEE Main 2025, 4 April (Morning Shift)

Benzene is treated with oleum to produce compound (X) which when further heated with molten sodium hydroxide followed by acidification produces compound (Y). The compound Y is treated with zinc metal to produce compound (Z). Identify the structure of compound (Z) from the following options.

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 11JEE Main 2025, 4 April (Morning Shift)

An organic compound (X) with molecular formula C3H6O is not readily oxidised. On reduction it gives C3H8O (Y) which reacts with HBr to give a bromide (Z) which is converted to Grignard reagent. This Grignard reagent on reaction with (X) followed by hydrolysis gives 2,3-dimethylbutan-2-ol. Compounds (X), (Y) and (Z) respectively are:

  1. CH3CH2CHO, CH3CH2CH2OH, CH3CH2CH2Br
  2. CH3COCH3, CH3CH(OH)CH3, CH3CH(Br)CH3
  3. CH3COCH3, CH3CH2CH2OH, CH3CH(Br)CH3
  4. CH3CH2CHO, CH3CH=CH2, CH3CH(Br)CH3

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