1.

The yellow colour solution of Na_(2)CrO_(4) changes to orange red on passing CO_(2) gas due to the formation of :

Answer»

`CrO_(5)` and `H_(2)O`
`CrO_(3)`
`Na_(2)Cr_(2)O_(7)` is not an oxidizing agent
`Cr_(2)O_(30`

Solution :Solution.


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