In which of the following reactions, `SO_(2)` acts as an oxidising agent?

Options

A. `I_(2)+SO_(2) +2H_(2)O to SO_(4)^(2-)+4H^(+)+2I^(-)`
B. `SO_(2)+2H_(2)S to 3S+2H_(2)O`
C. `3Fe+SO_(2) to FeS+2FeO`
D. `K_(2)Cr_(2)O_(7)+3SO_(2)+H_(2)SO_(4) to Cr_(2)(SO_(4))_(3)+K_(2)SO_(4) +H_(2)O`

Answer

B, C

Explanation

`SO_(2)` oxidizes metals and `H_(2)S. , SO_(2)+H_(2)S^(-2) to 2H_(2)O +3 overset(O)S, 3overset(O)Fe+SO_(2) to 2overset(+2)(FeO)+overset(+2)(FeS)`