Question

Which alkyl halide has the highest density and why ?

Answer 1

For a given alkyl group, alkyl iodide has the highest density; therefore the halide must be iodine. Since density decreases as the size of alkyl group increases; the alkyl must be methyl.

$C{H}_{3}I$ ; because of its smallest carbon content and heaviest halogen i.e., $I$

Therefore, methyl iodide has the highest density among the alkyl halides.