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Alcohols, Phenols and Ethers

NEET (UG) 2022MCQEasy📈 Topic in 38% papers+4−1
Ques. 1NEET (UG) 2022

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

  1. Both Statement I and Statement II are correct
  2. Both Statement I and Statement II are incorrect
  3. Statement I is correct but Statement II is incorrect
  4. Statement I is incorrect but Statement II is correct

Answer

(3) Statement I is correct but Statement II is incorrect

Solution

Statement I: As per NCERT, Lucas reagent (conc. HCl + anhydrous ZnCl2) distinguishes primary, secondary and tertiary alcohols by their different reactivity. Correct.

Statement II: The reactivity order is 3 > 2 > 1 (stability of carbocation). Tertiary alcohols give turbidity immediately at room temperature; primary alcohols do not give turbidity at room temperature. Incorrect.

Answer: (3)

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Ques. 2NEET (UG) 2022 (Phase 2)

Match the reagents (List-I) with the product (List-II) obtained from phenol. Choose the correct answer from the options given below :

  1. (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)
  2. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
  3. (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
  4. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
Ques. 3NEET (UG) 2022 (Phase 2)

Which one of the following reaction sequence is incorrect method to prepare phenol?

  1. [figure] , oleum, NaOH, H3O+
  2. Aniline, NaNO2 + HCl, H2O, heating
  3. Cumene, O2, H3O+
  4. [figure] , NaOH, STP condition
Ques. 4NEET (UG) 2021

What is the IUPAC name of the organic compound formed in the following chemical reaction? Acetone [(ii) H2O, H+](i) C2H5MgBr, Dry ether product

  1. 2-methylbutan-2-ol
  2. 2-methylpropan-2-ol
  3. pentan-2-ol
  4. pentan-3-ol
Ques. 5NEET (UG) 2020

Anisole on cleavage with HI gives :

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 6NEET (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
Ques. 7NEET (UG) 2019

The compound that is most difficult to protonate is :

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 8NEET (UG) 2019

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

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 9NEET 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. 10NEET 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. 11NEET 2018

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

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

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