JEE CHEMISTRY MCQ: HALOALKANES AND HALO ARENES

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Analyzing +4 | -1

Among the following, the most reactive towards alcoholic

{KOH}

is :

View answer and explanation

Correct option: B

{CH}_3 {COCH}_2 {CH}_2 {Br}

Option B (

{CH}_3 {COCH}_2 {CH}_2 {Br}

) is correct because the presence of the electron-withdrawing carbonyl group makes the beta-hydrogens more acidic, facilitating elimination by alcoholic KOH.

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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:

RI > {R B r} > {R C I} > {R F}

.

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: