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A solution of potassium chromate is trea...

A solution of potassium chromate is treated with an excess of dilute nitric acid. Then the observations is

A

`Cr^(3+)` and `Cr_20_7^(2-)` are formed

B

`Cr_20_7^(2-)` and `H_2O` are formed

C

`Cr_20_7^(2-)` is reduced to +3 state of Cr

D

`Cr_20_7^(2-)` is oxidised to +7 state of Cr

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The correct Answer is:
B
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AAKASH SERIES-REVISION EXERCISE -d-BLOCK ELEMENTS
  1. Reaction of KMnO4 in neutral or very weakly acidic solution can be rep...

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  2. When KMnO4 is added to oxalic acid, the decolourisation is slow in the...

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  3. A solution of potassium chromate is treated with an excess of dilute n...

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  4. K2Cr2O7 cannot be used for

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  5. When acidified solution of potassium dichromate is shaken with aqueous...

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  6. The blue colour produced on adding hydrogen peroxide to acidified K2Cr...

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  7. Which of the following metals is known to form acidic oxide

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  8. In the dichromate dianion

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

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  10. Which of the following element has f electro nic configuration in its ...

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  11. The natures of the oxides CrO and CrO3, respectively

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  12. Acedified K2Cr2O7 cannot oxidise

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  13. The equilibrium Cr2O7^(2-) hArr 2CrO4^(2-)

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  14. The correct statement among the following is

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  15. Identify the correct statements among the following I) Both Cr and...

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  16. Which of the following has very high IP2 value

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  17. Zn, Cd and Hg are only 'd' block elements but not transition elements ...

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  18. Acidified KMnO4 oxidizes nitrites to

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  19. Permanganate ion oxidize S2O3^(2-) in fairly alkaline solutions to giv...

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  20. Which of the following ions is most para-magnetic

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