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The yellow colour of chromates changes t...

The yellow colour of chromates changes to orange on acidification due to the formation of

A

`Cr^(3+)`

B

`Cr_(2) O_(3)`

C

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

D

`CrO^(4-)`

Text Solution

Verified by Experts

The correct Answer is:
C
`underset(yellow)(CrO_(4)^(-))overset(H^(+))hArrunderset("orange")(Cr_(2)O_(7)^(-2))`
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Knowledge Check

  • The yellow colour of chromates changes to orange on acidification due to formation of:

    A
    `Cr^(3+)`
    B
    `Cr_(2)(CO_(3))_3`
    C
    `Cr_(2)O_(7)^(2-) `
    D
    `CrO_(4)^(-)`

  • When SO_(2) gas is allowed to react with acidified potassium dichromate solution , the yellow colour of the solution changes to green. This is due to the formation of

    A
    `Cr_(2)O_(3)`
    B
    `Cr_(2)(SO_(4))_(3)`
    C
    `K_(2)SO_(4)`
    D
    `H_(2)SO_(3)`

  • The yellow colour of autumn levaes is due to

    A
    fucoxanthin
    B
    lutein
    C
    lycopene
    D
    zeauanthin

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