2-methylpropane on monochlorination under photochemical condition gives -

Options

A. 2-chloro-2-methylpropane as major product
B. (1:1) mixture of 1-chlor-2-methylpropane and 2-chloro-2-methylpropane
C. 1-chloro-2-methylpropane as major product
D. (1:9) mixture of 1-chloro-2-methylpropane and 2-chloro-2-methylpropane

Explanation

`underset("2-methylpropane")(H_(3)C - underset(underset(CH_(3))(|))overset(overset(H)(|))(C) - CH_(3)) overset(Cl_(2)//hv)rarr underset("2-chloro-2-methylpropane(A)")(H_(3)C - underset(underset(CH_(3))(|))overset(overset(Cl)(|))(C) - CH_(3)) + underset("1-chloro-2-methylpropane")(H_(3)C - underset(underset(CH_(3))(|))(CH) - CH_(2)- Cl)`
`.:`Ratio of A and B in the mixture is `5:9` , though `3^(@)`H is more active than `1^(@)`H , but in this case number of `1^(@)`H is 9 times than that of `3^(@)`H.