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CBSE

Subject

Chemistry

NEET Chemistry : Alcohols, Phenols and Ethers

Multiple Choice Questions

61.

Assertion : Oxidation of 1-nitronaphthalene gives o-nitrophthalic acid whereas 1-amino naphthalene on oxidation gives phthalic acid.

Reason : An amino group attached to the benzene ring makes it resistant to oxidation whereas nitro group makes the benzene ring susceptible to oxidation.

If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.

62.

The acidic strength of the given compounds follows the order

I. CH₃-CH=CH-COOH

II. CH₃- $O_{. .}^{. .}$ -CH=CH-COOH

III. CH₃=CH₂-COOH

II > III > I
III > II > I
II > I > III
I > II > III

63.

Decreasing order of reactivity in Williamson synthesis of the following :

I. Me₃CCH₂Br

II. CH₃CH₂CH₂Br

III. CH₂=CHCH₂Cl

IV. CH₃CH₂CH₂Cl

III > II > IV > I
I > II > IV > III
II > III > IV > I
I > III > II > IV

64.

(CH₃)₃COCH₃ and CH₃OC₂H₅ are treated with hydroiodic acid. The fragments obtained after reactions are respectively

(CH₃)₃CI + CH₃OH; CH₃I + C₂H₅OH
(CH₃)₃CI + CH₃OH; CH₃OH + C₂H₅I
(CH₃)₃COH + CH₃I; CH₃OH + C₂H₅I
CH₃I + (CH₃)₃COH; CH₃I + C₂H₅OH

65.

Assertion: Phenol forms 2, 4, 6-tribromophenol on treatment with Br₂- water at 273 K.

Reason : Phenol is o, p- directing group.

If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false
If both assertion and reason are false