The increasing order of reduction of alkyl halides with zinc and dilute HCl is

Options

A. `R - Cl lt R - I lt R - Br`
B. `R - Cl lt R - Br lt R - I`
C. `R - I lt R - Br lt R Cl`
D. `R - Br lt R - I lt R - Cl`

Answer

B

Explanation

The teactivity of halogens with alkane is `F_(2) gt Cl_(2) gt Br_(2) gt I_(2)` Hence, reduction of alkyl halide with Zn and dilute HCl follows reverse order i.e. , `R - I gt R - Br gt R - Cl` . Further, the reactivity of this reduction increases as the strength of C - X bond decreases