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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
`Cr_(2)O_(7)^(2-) + 2OH^(-) rarr 2CrO_(4)^(2-) + H_2O`
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DISHA PUBLICATION-THE D- AND F- BLOCK ELEMENTS -EXERCISE - 1 CONCEPT BUILDER (TOPIC 2 : COMPOUNDS OF TRANSITION METALS)
  1. The oxoanion in which the oxidation state of the central atom is same ...

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  2. When an aqueous solution of copper (II) sulphate is saturated with amm...

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  3. When concentrated HCI is added to an aqueous solution of CoCl(2...

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  4. Colourless solutions of the following four salts are placed separately...

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  5. The correct statements of the following

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  6. Among the following, the compound that is both paramagnetic and colour...

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

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  8. What would happen when a solution of potassium chromate is treated wit...

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  9. The oxidation state of chromium in the final product formed by the rea...

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  10. The final products formed on the addition of KI to copper sulphate sol...

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  11. KMnO(4) (acidic / alkaline ) is not decolurised by

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  12. Acidified K(2)Cr(2)O(7) solution turns green when NasO(3) is added to ...

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  13. KMnO4 can be prepared fromK2MnO4 as per the reaction: The reaction ...

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  14. The pair of compounds that can exist together is:

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  15. In acidic medium, H(2)O(2) changes Cr(2)O(7)^(-2) to CrO(5) which has ...

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  16. The reaction of aqueous KMnO(4) with H(2)O(2) i acidic conditions give...

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  17. Which of the following processes does not involve oxidation of iron ?

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  18. Assuming complete ionization , same moles of which of the following co...

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  19. Which one of the following statements is correct when SO(2) is passed ...

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  20. Name the gas that can readily decolourise acidified KMnO(4) solution:

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