It we see the reaction of methane with halogen, the rate determining step for chlorination is, endothermic reaction of the chlorine atom with methane to form methyl radical and a molecule of HCl. So free radical is the intermediate of the reaction. Formation of free radical depends upon the energy required to break a bond between a hydrogen atom and a carbon atom. Chlorination of propane and Bromination of propane. when compared it is found that bromination is more selective than chlorination. The probability factor for `3^(@),2^(@),1^(@)H` atom is `5.0:3.8:1.0` at `25^(@)C` for chlorination.
Isobutane when reacts with chlorine in presence of ultra violet radiations yield 2 products primary hydrogen substituted and `3^(@)` hydrogen substituted Find their % in product mixture

Options

A. 64% 36%
B. 72% 28%
C. 36% 64%
D. 30% 70%

Answer

A