a : When `3^(@)` alkyl halide is used in Williamson 's synthesis what will be the major product and why ?
b : When `3^(@)` alkoxide is used in Williamson's synthesis what will be the major product and why ?

Explanation

(a) Tendency of elimination of alkyl halides increases in the order of `3^(@) gt 2^(@) gt 1^(@)` , so major product will be alkene .
(b) When `3^(@)` alkoxide is used with `1^(@)` alkyl halide ether is obtained as major product .