Ethylene difluoride on hydrolysis gives

$Methyl$ chloride reacts with silver acetate to yield:

What is formed when $1$-bromo-$3$-chlorocyclobutane is treated with $2$ equivalents of sodium in ether?

The reduction of chloroform with $Zn$ and $HCl$ (alc.) gives ..........

An alkyl bromide reacts with sodium ethoxide and ethanol to give only one alkene. Hydrogenation of this alkene yields $2-$methylbutane. What is the alkyl halide?

Which of the following $S_N2$ reactions is the slowest?