`Cl_(2)`and `SO_(2)` are pollutants as well as bleaching agents . Their bleaching action is due to

Options

A. `SO_(2)`= Oxidation, `Cl_(2)`=Oxidation
B. `SO_(2)`= Reduction, `Cl_(2)`=Reduction
C. `SO_(2)`= Oxidation, `Cl_(2)`=Redution
D. `SO_(2)`= Reduction, `Cl_(2)`=Oxidation

Answer

D

Explanation

`SO_(2)` in the presence of moisture releases nascent `H` which acts as bleaching agent of flowers, textiles , etc.
`SO_(2) + 2H_(2)O rarr H_(2)SO_(4)+underset("Bleaching agent")(2H)`
`Cl_(2)` in the presence of moisture release nascent `O` which acts as bleaching agent.
`Cl_(2)+H_(2)O rarr 2HCl+underset("Bleaching agent")(O)`.