• # question_answer 42)   The increasing order of reduction of alkyl halides with zinc and dilute $HCl$ is : (a) $R-Cl<R-I<R-Br$                                      (b) $B{{r}_{2}}<C{{l}_{2}}<{{F}_{2}}<{{I}_{2}}$ (c)${{F}_{2}}<C{{l}_{2}}<B{{r}_{2}}<{{I}_{2}}$                                                    (d) $B{{r}_{2}}<{{I}_{2}}<C{{l}_{2}}<{{F}_{2}}$

(b) The reactivity of reduction of alkyl halides with Zn/HCl increases as the strength of the C?X bond decreases, i.e., $R-Cl<R-Br<R-I.$