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The yellow colour solution of Na(2)CrO(4...

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

A

`CrO_(5)`

B

`CrO_(3)`

C

`Na_(2)Cr_(2)O_(7)`

D

`Na_(3)CrO_(8)`.

Text Solution

Verified by Experts

The correct Answer is:
C
`CO_(2)+H_(2)OtoH_(2)CO_(3)hArr2H^(+)+CO_(3)^(2-),CrO_(4)^(2-)+2H^(+)hArrCr_(2)O_(7)^(2-)("orange red")+H_(2)O`
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