The order of rate of hydrolysis of alkyl halides `1^(@),2^(@),3^(@)` and `CH_(3)X` by the `S_(N^(2))` pathway is :

Options

A. `1^(@) gt 2^(@) gt 3^(@)gtCH_(3)X`
B. `CH_(3)X gt 3^(@) gt 2^(@) gt 1^(@)`
C. `CH_(3)X gt 1^(@) gt 2^(@) gt 3^(@)`
D. `3^(@) gt 2^(@) gt 1^(@)gtCH_(3)X`

Answer

C

Explanation

Reactivity decreases as steric hindrance increases, i.e., `CH_(3)X gt 1^(@) gt 2^(@) gt 3^(@)`.