Give reasons for the following in one or two sentences`:`
`i.` Methane does not react with chloring in dark.
`ii.` Propene reacts with `HBr` to give isopropy bormide but does not give `-n` propyl bromide.

Explanation

`i.` `CH_(4)` does not react with `Cl_(2)` in dark because the reaction proceeds `via` free`-` radical mechanism `,` `Cl(` chlorine radicals`)` are obtained from `Cl_(2)` in the presence of light.
`ii.` It is in accrodance with Markovnikov's rule which predicts the stability of `2^(@)C^(o+)` over `1^(@)C^(o+)`.