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Alcohols, Phenols and Ethers

NEET (UG) 2020MCQEasy📈 Topic in 25% papers+4−1
Ques. 1NEET (UG) 2020

Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give :

  1. Sec. butyl alcohol
  2. Tert. butyl alcohol
  3. Isobutyl alcohol
  4. Isopropyl alcohol

Answer

(2) Tert. butyl alcohol

Solution

As per NCERT, a ketone with a Grignard reagent followed by hydrolysis gives a tertiary alcohol.

(CH3)2C=O + CH3MgCl (CH3)3C-OMgCl

(CH3)3C-OMgCl H2O (CH3)3C-OH + Mg(OH)Cl

the product is 2-methylpropan-2-ol, i.e. tert-butyl alcohol.

Answer: (2)

Keep practising — Alcohols, Phenols and Ethers

Ques. 2NEET (UG) 2019

The compound that is most difficult to protonate is :

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 3NEET (UG) 2019

The structure of intermediate A in the following reaction, is : [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 4NEET 2018

The compound A on treatment with Na gives B, and with PCl5 gives C. B and C react together to give diethyl ether. A, B and C are in the order

  1. C2H5OH, C2H6, C2H5Cl
  2. C2H5OH, C2H5Cl, C2H5ONa
  3. C2H5Cl, C2H6, C2H5OH
  4. C2H5OH, C2H5ONa, C2H5Cl
Ques. 5NEET 2018

In the reaction, [figure] the electrophile involved is

  1. dichloromethyl cation ( CHCl2)
  2. formyl cation ( CHO)
  3. dichloromethyl anion ( CHCl2)
  4. dichlorocarbene (:CCl2)
Ques. 6NEET 2018

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

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 7NEET 2017

The heating of phenyl methyl ether with HI produces

  1. iodobenzene
  2. phenol
  3. benzene
  4. ethyl chloride.
Ques. 8NEET 2017

Which one is the most acidic compound?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 9NEET 2016 (Phase 1)

The reaction [figure] can be classified as

  1. dehydration reaction
  2. Williamson alcohol synthesis reaction
  3. Williamson ether synthesis reaction
  4. alcohol formation reaction.
Ques. 10AIPMT 2015

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

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 11AIPMT 2015

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

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