Question

Alkyl halide from the pair would react more rapidly by an `S_(N) 2` mechanism ? Explain your answer .
`CH_3 CH_(2) underset(Br)underset(|)(C)HCH_(3) or H_(3) C - overset(CH_(3))overset(|)underset(CH_(3))underset(|)(C)- Br`

Answer 1

`CH_(3)CH_(2)underset(Br)underset(|)(C)H CH_(3)` Secondary halide reacts faster than tertiary halide .