When alkyl halide is heated with dry Ag₂O, it produces

Alkyl halides on reaction with dry silver oxide furnish ether.

$2{\mathrm{CH}}_3\mathrm{Cl}+{\mathrm{Ag}}_2\mathrm{O}\stackrel{\mathrm{\Delta }}{\to }\underset{\left(\text{methoxy methane}\right)}{{\mathrm{CH}}_3{\mathrm{OCH}}_3}+2\mathrm{AgC}l$