Friedel (Craft's Alkylation and Acylation,...) NEET Questions

Organic Chemistry - Hydrocarbons

Friedel (Craft's Alkylation and Acylation,...) MCQ Questions


13.
The ortho/para directing effect of the -OH group in a substituted benzene is due to the group’s
A.
Polarizing effect
B.
Withdrawal of electron density from the ring
C.
Neutral effect
D.
Donation of electron density to the ring
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ANSWER :
D. Donation of electron density to the ring
14.
Which type of carbocation intermediate is formed during Friedel-Craft’s alkylation of benzene?
A.
Alkyl cation
B.
Primary carbocation
C.
Tertiary carbocation
D.
Secondary carbocation
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ANSWER :
D. Secondary carbocation
15.
The Friedel-Craft’s acylation of benzene with acyl chloride results in the formation of a compound that has a
A.
Carbonyl chloride group
B.
Chlorine atom
C.
Chlorine group
D.
Carbonyl group
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ANSWER :
D. Carbonyl group
16.
In Friedel-Craft’s acylation of benzene, which of the following compounds is a product of the reaction?
A.
Phenylmethanol
B.
Phenylamine
C.
Phenylalcohol
D.
Acetophenone
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ANSWER :
D. Acetophenone
17.

The electron-withdrawing group -NO2 on a benzene ring makes it more likely to undergo substitution at which position?

A.

None of the above

B.

Ortho position

C.

Para position

D.

Meta position

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ANSWER :

D. Meta position

18.

The electron-donating group -NH2 in a benzene ring increases the rate of Friedel-Craft’s acylation by

A.

Decreasing electron density at the ortho and para positions

B.

Increasing electron density at the ortho and para positions

C.

Having no effect

D.

Increasing electron density at the meta position

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ANSWER :

B. Increasing electron density at the ortho and para positions