Write the product(s) formed when
(i) 2-Bromopropane undergoes dehydrohalogenation reaction.
(ii) Chlorobenzene undergoes nitration reaction.
(iii) Methylbromide is treated with KCN.

Explanation

(i) ` H_3C-overset(H)overset(|)underset(Br)underset(|)C-CH_3 overset("dehydrohalogenation")underset(alc. (KOH))to underset("Propane")(CH_3-CH=CH_2)`
(ii)
(iii) `underset("Methylbromide")(CH_3Br+ KCN) tounderset("Methylcyanide")(CH_3 CN)` .