Halo alkane in the presence of alcoholic KOH undergoes

Options

A. elimination
B. polymerisation
C. dimerisation
D. substitution

Answer

A

Explanation

When an alkyl halide is heated with alcoholic solution of caustic potash dehydrohalogenation occurs, a molecule of hydrogen halide is eliminated fromm the adjacent carbon atoms, producing a double bond. In dehydrohalogenation preferential order for elimination of H is `3^(@) gt 2^(@) gt 1^(@)` (Saytzeff rule).