Hydrocarbons - Result Question 91

####79. Give reasons for the following in one or two sentences :

(i) Methane does not react with chlorine in the dark.

(ii) Propene reacts with $HBr$ to give isopropyl bromide but does not give $n$-propyl bromide.

$(1983,1 M \times \mathbf{2}=\mathbf{2 M})$

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Solution:

  1. (i) Free radical chlorination of alkane require energy which is supplied either in the form of heat or radiation.

(ii) Addition of $HBr$ proceeds through carbocation intermediates.



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