JEE CHEMISTRY MCQ: HALOALKANES AND HALO ARENES

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Fires result from the combustion of alkali metals can be extinguished by:

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Correct option: A

\mathrm{CC}{\mathrm{l}_4}

Option A (CCl₄) is correct because carbon tetrachloride (CCl₄) is a non-flammable liquid that can extinguish fires involving alkali metals by smothering the fire and preventing oxygen from reaching the metal.

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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}

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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: