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Which of the following changes requires ...

Which of the following changes requires a reducing agent ?

A

`H_(3)AsO_(3)rarrHAsO_(4)^(2-)`

B

`BrO_(3)^(ө)rarrBrO^(ө)`

C

`CrO_(4)^(2-)rarrCr_(2)O_(7)^(2-)`

D

`Al(OH)_(3)rarr[Al[OH)_(4)]^(ө)`

Text Solution

Verified by Experts

The correct Answer is:
B
`4e^(-)+BrO_(3)^(ө)rarrBrO^(ө)`
`x-6= -1, x-2=-1`
`x=5, x=+1`
The reduction undergoes reduction, i.e., it acts as oxidising agent, so it requires a reducing agent.
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CENGAGE CHEMISTRY-REDOX REACTIONS-Ex 2.2
  1. Indicate the species which are oxidised and reduced in the following r...

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  2. What is the oxidation stae of Cl in (a) CrO(2)Cl(2) , (b) HClO(4) ...

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  3. Balance the following half-reactions in acidic medium: (a) IO(3)^(Ө)...

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  4. Write balanced redox reactions for each of the following reactions: ...

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  5. Balance the following chemical reactions (by ion electron method) (a...

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  6. Write balanced ionoic half equation (oxidation and reduction) for each...

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  7. Balance the following half reactions in basis medium: (a) CrO(4)^(2-...

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  8. Write balanced net ionic equations for the following reactions in basi...

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  9. Balanced the following equations: (a) H(2)O(2)+H^(o+)+Fe^(2+)rarr H(...

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  10. For the redox reaction: Cr(2)O(7)^(2-)+H^(o+)+NirarrCr^(3+)+Ni^(2)+H...

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  11. SO(2) under atomspheric condition changes to SO(x)^(2-). If oxidation ...

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  12. Which of the following can act as an oxidising agent as well as a redu...

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  13. Sulphur has highest oxidation state in

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  14. The number of electrons involved in the reduction of nitrate (NO(3)^(ө...

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  15. Oxidation number of P in Ba(H(2)PO(2))(2) is

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  16. Which of the following is a disproportional reactions ?

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  17. In balancing the half reaction CN^(ө)rarrCNO^(ө)(skeltan) The numb...

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  18. Which of the following changes requires a reducing agent ?

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