CH-=CH underset(dil.H_(2)SO_(4))overset(Hg^(2+))toAunderset(HCl)overset(Zn-Hg)toB B is
Compound (X)underset(H_(2)SO_(4))overset((1)HgSO_(4))tooverset((2)NaBH_(4))tounderset(HCl)overset((3)ZnCl_(2))to product gives precipitate in 5 min. Compound (X) is
CH_(3)CHOunderset(5^(@)C)overset(10%NaOH)tounderset(Delta)tounderset(Ni)overset(H_(2))to(A): product (A) of the reaction is,