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K(2)Cr(2)O(7) on heating with aqueous Na...

`K_(2)Cr_(2)O_(7)` on heating with aqueous NaOH gives

A

`CrO_(4)^(2-)`

B

`Cr(OH)_(3)`

C

`Cr_(2)O_(7)^(2-)`

D

`Cr(OH)_(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
`K_(2)Cr_(2)O_(7) + 2NaOH to K_(2)CrO_(4) to K_(2)CrO_(4) + Na_(2)CrO_(4) + H_(2)O`
Hence, `CrO_(4)^(2-)` ion is obtained.
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