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Number of Cr-O sigma bonds in dichromate...

Number of Cr-O sigma bonds in dichromate in `Cr_(2)O_(7)^(2-)` is

A

6

B

7

C

8

D

4

Text Solution

Verified by Experts

The correct Answer is:
C
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In the reaction the stoichiometry coefficients of Cr_(2)O_(7)^(2-) , NO_2^(-) and H^(+) respectively are Cr_(2)O_(7)^(2-) +NO_(2)^(-) +H^(+) rarr Cr^(3+) +NO_(3)^(-) +H_(2)O

The number of moles of MnO_(4)^(-) and Cr_(2)O_(7)^(-2) separately required to oxidise 1 mole of FeC_(2)O_(4) each in acidic medium respectively

AAKASH SERIES-D-BLOCK ELEMENTS-OBJECTIVE EXERCISE-1 (PERMANGANATE AND DICHROMATE)
  1. When KMnO4, reacts with acidified FeSO4

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  2. Permanganate ion is not isostructural with

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  3. When MnO(2) is fused with KOH in air, it gives

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  4. The number of moles of KMnO4 that will be needed to react completely w...

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  5. The product of oxidation of I with MnO(4) in alkaline medium is

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  6. Number of Cr-O sigma bonds in dichromate in Cr(2)O(7)^(2-) is

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  7. Which of the following oxides give chromic acid in sulphuric acid solu...

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  8. Number of moles of K(2)Cr(2)O(7) reduced by one mole of Sn^(2+) ions i...

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  9. Which of the following statements is/are true A) Na(2) r(2), O(7) is...

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  10. The shape of chromate ion is

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  11. When Na(2)CrO(4), is dissolved in sulphuric acid, it changes to

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  12. Oxidation number of chromium in chromyl chloride is

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  13. For the reaction CrO(4)^(2-)+?rarrCr(2)O(7)^(-2)  the missing ion is

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  14. Strongest oxidant among the following is

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  15. Highest tendency for M^(+3) rarrM^(+2) is in

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  16. Match the following columns

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  17. When MnO(2) is fused with KOH in air, it gives

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  18. Which of the following cannot be oxidised by the acidified solution of...

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  19. Structure of Cr(2)O(7)^(2-) has

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  20. Which one of the following permanga nometric titrations does not give ...

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