Give the preparation of alkyl halide by the reaction of:
(i) HCl and
(ii) `PCI_(5)` on ethanol and give its reaction with :
(a) Aq. KOH
(b) AgCN and
(c) Mg.

Explanation

`C_(2)H_(5)OH+ HCl underset(Delta)overset("Anhy." ZnCl_(2))to C_(2)H_(5)Cl+ H_(2)O`
`C_(2)H_(5)OH+ PCI_(5) overset(Delta)to C_(2)H_(5)Cl+HCl+POCl_(3)`
(a)`C_(2)H_(5)Cl+KOH_((aq))to C_(2)H_(5)OH+KCl`
(b) `C_(2)H_(5)Cl+ AgCN to C_(2)H_(5)CN+ AgCl`
(c) `C_(2)H_(5)Cl+Mg to C_(2)H_(5)MgCl`