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In balancing the half reaction CN^(ө)rar...

In balancing the half reaction `CN^(ө)rarrCNO^(ө)`(skeltan) The number of electrons that must be added is

A

0

B

1 on the right

C

1 on the left

D

2 on the right

Text Solution

Verified by Experts

The correct Answer is:
D
`CN^(-) to CNO^(-)`
Oxidation number of nitrogen in `CN^(-)` `4+x = -1` and in `CNO^(-) 4 + x-2 =-1`
`x=-5 , x=-3`
`CN^(-)` is thus oxidised by losing two electrons.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-REDOX REACTIONS-Exercise 2
  1. In balancing the half reaction CN^(ө)rarrCNO^(ө)(skeltan) The number ...

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  2. Hot concentrated sulpuric acis is a moderatly strong oxidizing agent. ...

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  3. Choose the disproportionation reaction among the following redox react...

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  4. In which of the following reactions, H(2)O(2) acts as a reducing agent...

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  5. Observe the following reaction, 2NO(2)(g) + 2OH^(-)(aq) to NO(3)^(-)...

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

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  7. The oxidation number of Cr in K(2)Cr(2)O(7) is

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  8. Oxidation number of sulphur in Na(2)S(2)O(3) is

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  9. Both oxidation and reduction takes place in

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  10. The oxidant which cannot act as a reducing agent is

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  11. In the reaction Ag(2)O+H(2)O(2) rarr 2Ag+H(2)O+O(2),H(2)O(2) acts as

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  12. A compound contains three elements A,B and C, if the oxidation number ...

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  13. Which of the following is the example of a disproportionation reaction...

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  14. Which combination appears odd with respect to oxidation number per ato...

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  15. Nitric oxide acts as a reducing agent in which of the following reacti...

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  16. In which of the following, increasing orders the oxidation number of o...

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  17. In the reaction 3Br(2) + 6CO(3)^(2-) + 3H(2)O to 5Br^(-) + 2BrO(3)^(...

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  18. MnO(4)^(-) is a good oxidising agent in different medium changing to ...

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  19. The reaction, 10FeSO(4) + 2KMnO(4) + 8H(2)SO(4) to 2MnSO(4) + 5Fe(2)...

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  20. Which of the following is a redox reaction?

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  21. Given, xNa(2)HAsO(3) + y NaBrO(3) + z HCl to NaBr + H(3) AsO(4) + NaCl...

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