1.

The yellow coloured solution of chromate salt changes to orange colour on acidification due to the formation of :

Answer»

`CR^(3+)`
`Cr_(2)O_(7)^(2-)`
`CrO_(4)^(-)`
`Cr_(2)O_(3)`

Solution :`2CrO_(4)^(2-) + 2H^(+) underset("alkali")OVERSET("acid")to underset("Orange")Cr_(2)O_(7)^(2-) + H_(2)O`


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