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66
MCQ (Single Correct Answer)

Assertion (A) Like bromination of benzene, bromination of phenol is also carried out in the presence of Lewis acid.

Reason (R) Lewis acid polarises the bromine molecule.

A
Assertion and reason both are correct and reason is correct explanation of assertion.
B
Assertion and reason both are wrong statements.
C
Assertion is correct statement but reason is wrong statement.
D
Assertion is wrong statement but reason is correct statement.
E
Both assertion and reason are correct statements but reason is not correct explanation of assertion.
67
MCQ (Single Correct Answer)

Assertion (A) o-nitrophenol is less soluble in water than the $m$ and p-isomers.

Reason (R) $m$ and $p$-nitrophenols exist as associated molecules.

A
Assertion and reason both are correct and reason is correct explanation of assertion.
B
Assertion and reason both are wrong statements.
C
Assertion is correct statement but reason is wrong statement.
D
Assertion is wrong statement but reason is correct statement.
E
Both assertion and reason are correct statements but reason is not correct explanation of assertion.
68
MCQ (Single Correct Answer)

Assertion (A) Ethanol is a weaker acid than phenol.

Reason (R) Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH .

A
Assertion and reason both are correct and reason is correct explanation of assertion.
B
Assertion and reason both are wrong statements.
C
Assertion is correct statement but reason is wrong statement.
D
Assertion is wrong statement but reason is correct statement.
E
Both assertion and reason are correct statements but reason is not correct explanation of assertion.
69
MCQ (Single Correct Answer)

Assertion (A) Phenol forms 2, 4, 6-tribromophenol on treatment with $\mathrm{Br}_2$ in carbon disulphide at 273 K .

Reason (R) Bromine polarises in carbon disulphide.

A
Assertion and reason both are correct and reason is correct explanation of assertion.
B
Assertion and reason both are wrong statements.
C
Assertion is correct statement but reason is wrong statement.
D
Assertion is wrong statement but reason is correct statement.
E
Both assertion and reason are correct statements but reason is not correct explanation of assertion.
70
MCQ (Single Correct Answer)

Assertion (A) Phenols give o -and p -nitrophenol on nitration with conc. $\mathrm{HNO}_3$ and $\mathrm{H}_2 \mathrm{SO}_4$ mixture.

Reason $(\mathrm{R})-\mathrm{OH}$ group in phenol is $\mathrm{o}-\mathrm{p}$-directing.

A
Assertion and reason both are correct and reason is correct explanation of assertion.
B
Assertion and reason both are wrong statements.
C
Assertion is correct statement but reason is wrong statement.
D
Assertion is wrong statement but reason is correct statement.
E
Both assertion and reason are correct statements but reason is not correct explanation of assertion.
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