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90
MCQ (Single Correct Answer)

Assertion (A) tert-butyl bromide undergoes Wurtz reaction to give 2,2,3,3-tetramethylbutane.

Reason (R) In Wurtz reaction, alkyl halides react with sodium in dry ether to give hydrocarbon containing double the number of carbon atoms present in the halide.

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 but reason is wrong statement.
D
Assertion is wrong but reason is correct statement.
E
Assertion and reason both are correct statements but reason is not correct explanation of assertion.
91
MCQ (Single Correct Answer)

Assertion (A) Presence of a nitro group at ortho or para position increases the reactivity of haloarenes towards nucleophilic substitution.

Reason (R) Nitro group, being an electron withdrawing group decreases the electron density over the benzene ring.

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 but reason is wrong statement.
D
Assertion is wrong but reason is correct statement.
E
Assertion and reason both are correct statements but reason is not correct explanation of assertion.
92
MCQ (Single Correct Answer)

Assertion (A) In monohaloarenes, further electrophilic substitution occurs at ortho and para positions.

Reason (R) Halogen atom is a ring deactivator.

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 but reason is wrong statement.
D
Assertion is wrong but reason is correct statement.
E
Assertion and reason both are correct statements but reason is not correct explanation of assertion.
93
MCQ (Single Correct Answer)

Assertion (A) Aryl iodides can be prepared by reaction of arenes with iodine in the presence of an oxidising agent.

Reason (R) Oxidising agent oxidises $\mathrm{I}_2$ into HI.

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 but reason is wrong statement.
D
Assertion is wrong but reason is correct statement.
E
Assertion and reason both are correct statements but reason is not correct explanation of assertion.
94
MCQ (Single Correct Answer)

Assertion (A) It is difficult to replace chlorine by -OH in chlorobenzene in comparsion to that in chloroethane.

Reason (R) chlorine carbon ( $\mathbf{C}-\mathbf{C l}$ ) bond in chlorobenzene has a partial double bond character due to resonance

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