NEET Chemistry The p-Block Elements (XII) Questions Solved


One gas bleaches the coloured matter by reduction temporary while the other one by oxidation
permanently. The gases are respectively:

(A) SO2 and Cl2                               (B) O3 and Cl2

(C) H2S and CO2                             (D) Cl2 and SO2

(A) (A) SO2+2H2OH2SO4+2H. Hence bleaching is through reducing (temporary) and

      Cl2+H2O2HCl+O bleaching is through oxidation (permanent).

      So (A) is correct and (B), (C) and (D) are incorrect.

Difficulty Level:

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