How will you convert:
(a) Ethyl chloride to propanoic acid.
(b) 1-Bromopropane to 2-bromopropane
(c) tert-butyl bromide to isobutyl bromide

Explanation

(b) Lithium ion is very small ion and therefore, it hasstrong positive field around it. Therefore, it can stabilize only a small anion `O^(2)`. Sodium is large and it can stablize large anion `O_(2)^(2-)` whereas potassium and rubidium being very large in size can easily stabilize larger superoxide `O_(2)^(-)` ion.