`a.`
Identigy `(B)` and `(C)` and also explain the formation of `C^(14)(C^(**))` in the compound `(C)`.

Explain the formation of (B), (C ) and (D) in the given reaction:

Explain the formation of (B), (C ) and (D) in the given reaction:

Explain the formation of C_2 H_2 molecule.

Explain the formation of products (B), (C), and (D) in the following reaction.

Explain the formation of products (B), (C), and (D) in the following reaction.

An organic compound (A) C_8 H_4 O_3 , in dry bebzene in the presence of anhydrous AlCl_3 gives compound (B ). The compound (B) on treatment with PCl_5 followed by reaction with H_2 //Pd (BaSo_4) gives compound (C ) which on reaction with hydrazine gives a cyclide compound (D) (C_(14) H_(10) N_2) . Identify (A), (B) (C ), and (D) Explain the formation of (D ) from (C ).

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.