A compound (A) `(C_7H_4N)` on hydrolysis with strong aqueous acid gives another compound (B) on treatment with ammonia gives a salt which on heating gives (C). The compound (C) undergoes Hofmann's bromamide reaction to yield aniline. Identify A, B, C and write chemcial reactions involved.

The compound A on treatment with Na gives B , and with PCl_(5) gives C . B and C react together to give di Ethyl ether. A,B and C are in the order

A ketone A, which undergoes halform reaction, gives compound B on reduction B on heating with sulphuric acid gives compounds C, which forms mono-ozonide D.D on hydrolysis in the presence of zinc dust gives only acetaldehyde. Identify A, B and C. Write down the reaction involved.

An element A occupies group number 15 and period number 3, reacts with chlorine to give compound B. The compound Bon hydrolysis gives a dibasic acidC. The compound C on heating undergoes auto oxidation and reduction to give a tribasic acid D. Identify the element A, compound B,C and D. Write the reactions.

The compound A on treatment with Na gives B, and with PCl_(5) gives C. B and C react together to give diethyl ether. A, B and C are in the order-

An organic compound A(C_2H_6O) reacts with sodium to form compound B and hydrogen gas. When heated with conc. H_2SO_4 at 413 K, A produces C(C_4H_(10)O) . C on reaction with conc. HI at 373 K forms D. C is also obtained when B is heated with D. Identify A, B, C and D and write chemical equations for the formation of B from A and the formation of C from B and D.

A green oxide of chromium(A), on fusion with KOH and KNO_3 gives a yellow compound (B). The aqueous solution of (B) on acidification with dilute H_2SO_4 gives an orange coloured compoud (C). Identify (B) and (C) and write down balanced chemical equations involved.