In nucleophilic aliphatic substitution,the nucleophiles are generally

In $E2$ elimination,many substances follow the Hofmann rule,which means.....

The reaction of $1$-chlorobutane with alcoholic potash gives $......$.

The reactivity of $2-$bromo$-2-$methylbutane $(I)$,$1-$bromopentane $(II)$ and $2-$bromopentane $(III)$ towards $S_N2$ displacement is such that :

In an $S_N2$ reaction on a chiral carbon atom,what is always produced?

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?