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 reactivity 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.