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Choose correct statements (s) regarding the following reactions.
`Cr_(2)O_(7)^(2-)(aq)+3SO_(3)^(2-)(aq)+8H^(+) rarr 2Cr^(3+)(aq)+3SO_(4)^(2-)(aq)+4H_(2)O`

A

`Cr_(2)O_(7)^(2-)` is oxidising agent

B

`SO_(3)^(2-)` is reducing agent

C

The oxidation number of per 'S' atom in `2SO_(3)^(2-)` is increase by two

D

The oxidation number of per 'Cr' atom in `Cr_(2)O_(7)^(2-)` is decrease by two

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A, B, C, D
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