JEE CHEMISTRY MCQ: HALOALKANES AND HALO ARENES

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For a given alkyl group, the densities/b. p./m. p. are in the order:

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Correct option: D

R\mathrm{Cl} < R\mathrm{Br} < R\mathrm{I}

Option D (

R\mathrm{Cl} < R\mathrm{Br} < R\mathrm{I}

) is correct because the densities, boiling points, and melting points of alkyl halides increase with increasing molecular weight due to stronger intermolecular forces.

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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: