Concentrated H_(2) SO_(4) on being heated with zinc yields a gas (A),which when passed through bromine solution produces a white precipitate (D) with BaCI_(2) solution while the acid (C), when heated with concentrated H_(2)SO_(4) yields the original gas (A) and another reddish brown gas (E). Identify B.

Concentrated H_(2) SO_(4) on being heated with zinc yields a gas (A),w

1.	Concentrated H_(2) SO_(4) on being heated with zinc yields a gas (A),which when passed through bromine solution produces a white precipitate (D) with BaCI_(2) solution while the acid (C), when heated with concentrated H_(2)SO_(4) yields the original gas (A) and another reddish brown gas (E). Identify B.
Answer» `H_(2) S` `H_(2)SO_(4)` `SO_(2)` `HBr` Solution :`A = SO_2, B = H_2SO_4, C = HBr, D = BaSO_4, E = Br_2` `Zn + 2H_2SO_4 OVERSET(Delta)(RARR)ZnSO_4 + 2H_2O + underset((A))(SO_2)UARR` `Br_2 + 2H_2O + SO_2 rarr underset((B))(H_2SO_4) + underset((C))(2HBr)` `H_2SO_4 + BaCl_2 rarr underset((D))(BaSO_4)darr + 2HCl` `underset((C))(2HBr) + H_2SO_4 overset(Delta)(rarr) 2H_2O + SO_2 + underset((E))(Br_2)`.