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Alcohols, Phenols and Ethers · Question 21

NEET 2018MCQMedium📈 Topic in 12% papers+4−1
1

Identify the major products P, Q and R in the following sequence of reactions : [figure]

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

Answer

(4) [figure]

Solution

Friedel–Crafts alkylation: the CH3CH2 CH2 carbocation rearranges by a 1,2-hydride shift to the more stable (CH3)2 CH carbocation.

⇒ P = cumene (isopropylbenzene), not n-propylbenzene.

As per NCERT (preparation of phenol from cumene), cumene is oxidised by air to cumene hydroperoxide, which on treatment with dilute acid gives phenol and acetone.

[figure]

P = cumene, Q = phenol, R = acetone (CH3-CO-CH3).

Answer: (4)

NEET 2018

Keep practising — Alcohols, Phenols and Ethers

2

The heating of phenyl methyl ether with HI produces

  1. iodobenzene
  2. phenol
  3. benzene
  4. ethyl chloride.
NEET 2017
3

Which one is the most acidic compound?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
NEET 2017
4

The reaction [figure] can be classified as

  1. dehydration reaction
  2. Williamson alcohol synthesis reaction
  3. Williamson ether synthesis reaction
  4. alcohol formation reaction.
NEET 2016 (Phase 1)
5

Which of the following is not the product of dehydration of [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
AIPMT 2015
6

Reaction of phenol with chloroform in presence of dilute sodium hydroxide finally introduces which one of the following functional group?

  1. -COOH
  2. -CHCl2
  3. -CHO
  4. -CH2Cl
AIPMT 2015
7

The reaction, [figure] is called

  1. Etard reaction
  2. Gattermann-Koch reaction
  3. Williamson synthesis
  4. Williamson continuous etherification process
AIPMT 2015 (Cancelled)
8

Identify Z in the sequence of reactions: CH3CH2CH=CH2 HBr/H2O2 Y C2H5ONa Z

  1. CH3-(CH2)3-O-CH2CH3
  2. (CH3)2CH-O-CH2CH3
  3. CH3(CH2)4-O-CH3
  4. CH3CH2-CH(CH3)-O-CH2CH3
AIPMT 2014
9

Among the following sets of reactants which one produces anisole?

  1. CH3CHO ; RMgX
  2. C6H5OH ; NaOH ; CH3I
  3. C6H5OH ; neutral FeCl3
  4. C6H5CH3 ; CH3COCl ; AlCl3
AIPMT 2014
10

Which of the following will not be soluble in sodium hydrogen carbonate?

  1. 2,4,6-Trinitrophenol
  2. Benzoic acid
  3. o-Nitrophenol
  4. Benzenesulphonic acid
AIPMT 2014
11

Among the following ethers, which one will produce methyl alcohol on treatment with hot concentrated HI?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
NEET 2013

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