`SO_(3)` on combining with `HCI` gives

KCIO_(3) on reaction with SO_(2) gives (A) and on reactionwith conc. H_(2)SO_(4) gives (B).(A) and (B) are

Reaction of 2-pentanol or 3-pentanol on reaction with HCI give both 2-chloropentane and 3-chloropentane. Explain.

A: Nitrobenzene on reduction with Zn//NaOH//Delta gives hydrazobenzene. R: Nitrobenzene on reduction with Sn/HCI gives aniline.

Ethyl nitrite on reduction with Sn/HCI gives:

Reduction of hydrazine with zinc and HCI gives