Orangecolourof Cr_(2)O_(7)^(2-)ioncharges toyellowin alkaliand yellows – InterviewSolution

1.	Orangecolourof Cr_(2)O_(7)^(2-)ioncharges toyellowin alkaliand yellowsolutionturnsout orangeon adding H^(+) ions.Explainwhy ?
Answer» Solution :(i)Whenorangesolutioncontaining`Cr_(2) O_(7)^(2-)` ION is treatedwith analkali a YELLOWSOLUTION of `Cr_(2)O_(4)^(2-)` is obtained . (ii)Similarly when `H^(+) ` ionsare addedto yellowsolutionan orangesolutionof `Cr_(2)O_(7)^(2-) ` isobtaineddue tointerrconversion.

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