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JEE CHEMISTRY MCQ: HALOALKANES AND HALO ARENES

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Which of the following is not correct?

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Correct option: A

{PhCH}_2 {Br}>{PhChBrCH}_3>{PhCBr}\left({CH}_3\right)_2\left({S}_{{N}} 1\right)

Option A (

{PhCH}_2 {Br}>{PhChBrCH}_3>{PhCBr}\left({CH}_3\right)_2\left({S}_{{N}} 1\right)

) is not correct because the stability of the carbocation intermediate increases with more alkyl substituents, thus increasing SN1 reactivity.

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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: