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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:
3
`2CrO_(4)^(2-)("yellow")+2H^(+)rarrCr_(2)O_(7)^(2-)("orange")+H_(2)O`
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  2. Transition elements are used as catalyst because :

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  3. The yellow colour of chromates changes to orange on acidification due ...

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  4. The number of mole of KMnO(4) that will be needed to react completely ...

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  5. Which one of the following compounds does not decolourise an acidified...

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  7. The basic character of the transition metal monoxide follows the order

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  9. Which of the following ions are colourless in the aqueous solutions ?

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  10. Which of the following factor may be regarded as the main cause of lan...

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  11. Why does ZnO show increased electrical conductivity and turns yellow o...

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  12. Which of the following is arranged in order of incresing melting point...

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  13. In which of the following reaction "Philosopher's wool" is formed

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  14. CrO3 dissolves in aqueous NaOH to give

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  15. Mercury on heating with aqua regia gives

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  16. The formula of azurite is :

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  17. Oxide of metal cation which is not amphoteric ?

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  18. The ratio of mass of a diamagnetic substance in a magnetic field to it...

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