The formation of alkene from alkyl halide is an example of

The reaction of $t-$butyl bromide with sodium methoxide mainly gives .............

Hydrolysis of an alkyl bromide $X$ $(C_5H_{11}Br)$ follows first-order kinetics. Reaction of $X$ with $Mg$ in dry ether followed by treatment with $D_2O$ gives $Y$. What is $Y$?

$A$ solution of $(+)-1$-chloro-$1$-phenylethane in toluene racemizes slowly in the presence of a small amount of $SbCl_5$ due to the formation of which of the following?

Decreasing the concentration of an electrophile (substrate) in a typical $S_N2$ reaction by a factor of $3$ will cause the reaction rate to

$1-$chlorobutane on treatment with alcoholic potash forms