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The oxidation state of Cr in Cr(2)O(7)^(...

The oxidation state of `Cr` in `Cr_(2)O_(7)^(2-)` is

A

`4`

B

`6`

C

`-6`

D

`-2`

Text Solution

Verified by Experts

The correct Answer is:
B
`overset(*)(C )r_(2)O_(7)^(2-)`
`2x-2xx7=-2`, `2x=14-2=12`
`x=(12)/(2)=+6`
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A2Z-REDOX REACTIONS-Section D - Chapter End Test
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  4. One mole of N(2)H(4) loses ten moles of electrons to form a new compou...

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  6. The oxidation number of S in S(8),S(2)F(2), and H(2)S, respectively, a...

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  7. Which one of the following reactions is not an example of redox reacti...

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  10. In a balanced equation H(2)SO(4)+xHI rarr H(2)S+YI(2)+zH(2)O, the valu...

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  11. MnO(4)^(2-) (1 mole) in neutral aqueous medium is disproportionate to

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  12. The conductivity of a saturated solution of BaSO4 is 3. 06 xx 10^(-6)...

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  13. H(2)O(2) reduces K(4)Fe(CN)(6)

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  14. When sodium metal is dissolved in liquid ammonia, blue colour solution...

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  15. Which of the following is redox reaction ?

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  16. In which of the following reactions H(2)O(2) is a reducing agent?

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  17. Which is the best description of the behaviour of bromine in the react...

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  18. Which of the following substances acts as an oxidising as well as a re...

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  19. When K(2)Cr(2)O(7) is converted to K(2)CrO(4), the change in the oxida...

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  20. Oxidation state of chlorine in perchloric acid is

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