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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_2O_7^(2-)`

D

`Cr(OH)_2`

Text Solution

Verified by Experts

The correct Answer is:
A
On alkali solution, `Cr_2O_7^(2-)` will reduce to `CrO_4^(2-)`.
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ERRORLESS-THE d-AND f- BLOCK ELEMENTS -Past Years Questions
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  2. The nitrate of which metal left globule on heating strongly

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

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

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

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  6. Which of the statements is not true ?

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  7. Which of the following does not give oxygen on heating ?

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

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

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  10. F2 is the formed by reacting K2MnF6 with

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  11. Assuming complete ionization, same moles of which of the following com...

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  12. To protect iron against corrosion, the most suitable metal plating on ...

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  13. When copper is heated with conc.HNO(3) it produces

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  14. Silver obtained from argentiferrous lead containing lead impurity is p...

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  15. Which of the following metals is obtained by leaching out process usin...

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  16. Which of the following does not react with AgCl?

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  17. Zn gives H(2) gas with H(2)SO(4) and HCl but not with HNO(3) because

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  18. The compound insoluble in water is

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

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  20. The magnitude and permanganate ions are tetrahedral due to

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