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JEE CHEMISTRY MCQ: HALOALKANES AND HALO ARENES
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Which reagent is useful in increasing the carbon chain of an alkyl halide?
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Correct option: B
KCN
Option B (KCN) is correct because KCN provides the cyanide ion which acts as a nucleophile and increases the carbon chain of the alkyl halide via an SN2 reaction.
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An alkyl halide reacts with metallic sodium in dry ether. The reaction is known as :
In electrophilic substitution reaction of chlorobenzene, the chloro group:
Which of the followings statements is/are incorrect?
Polymerization of alkenes takes place through
Assertion (A): The boiling points of alkyl halides decrease in the order:
.
Reason (R): The boiling points of alkyl chlorides, bromides and iodides are considerably higher than that of the hydrocarbon of comparable molecular mass. Friedel-Craft’s reaction of bromobenzene with methyl iodide gives:
.
Reason (R): The boiling points of alkyl chlorides, bromides and iodides are considerably higher than that of the hydrocarbon of comparable molecular mass. Friedel-Craft’s reaction of bromobenzene with methyl iodide gives: