Q.76 A colorless substance 'A' (C6H7N) is sparingly soluble in water and gives a water-soluble compound 'B' on treating with a mineral acid. On reacting with CHCl3 and alcoholic potash 'A' produces an obnoxious smell due to the formation of compound 'C. The reaction of 'N with benzenesulphony[ chloride gives compound 'D' which is soluble in alkali. With NaNO2 and HCl, 'A' forms compound 'E' which reacts with phenol in an alkaline medium to give an orange dye 'K Identity compounds 'A' to 'F.