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which of the following represent redox r...

which of the following represent redox reactions?
I. `Cr_(2)O_(7)^(2-)+2overset(ө)OHrarr2CrO_(4)^(2-)+H_(2)O`
II. `Zn+CuSO_(4)rarrZnSO_(4)+Cu`
III. `MnO_(4)^(ө)+3Mn^(2+)+4overset(ө)OHrarr5MnO_(2)+2H_(2)O`
IV. `2Cu^(o+)rarrCu+Cu^(2+)`

A

`I,II`

B

`I,III`

C

`III,IV`

D

`II,III,IV`

Text Solution

Verified by Experts

The correct Answer is:
D
`II, III and IV` are redox reactions.
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CENGAGE CHEMISTRY-REDOX REACTIONS-Exercises (Single Correct)
  1. The oxidation number of cobalt in K [Co(CO)(4)] is

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  2. Which of the following is not a disproprotionation reaction? I. NH(4...

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  3. which of the following represent redox reactions? I. Cr(2)O(7)^(2-)+...

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  4. In which of the following cases is the oxidation state of N atom wrong...

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  5. Which of the following is not a disproprotionation reaction?

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  6. The number of moles of K(2)Cr(2)O(7) reduced by 1 mol of Sn^(2+) ions ...

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  7. Which of the following is redox reaction ?

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  8. The oxidation state of Fe in Fe(CO)(5) is

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  9. In which of the following pairs is there the greatest difference in th...

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  10. [Which of the following is not an intermolecular redox reaction?

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  11. The number of moles of KMnO(4) required to oxidise 1 mol of Fe(C(2)O(4...

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  12. In the reaction K+O(2)rarrKO(2)

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  13. Which of the following is the best description of the behaviour of bro...

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  14. Cr(2)O(7)^(2-)+Xoverset(H^(o+))rarrCr^(3+)+H(2)O+ "oxidised product" o...

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  15. The oxidation state of chrominium in the final product formed in the r...

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  16. The number of moles of KMnO(4) reduced by 1 "mol of" KI in alkaline me...

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  17. In the balanced chemical reaction IO(3)^(ө)+aI^(ө)+bH^(ө)rarrcH(2)O+...

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  18. For the reaction M^(x+)+MnO(4)^(ө)rarrMO(3)^(ө)+Mn^(2+)+(1//2)O(2) ...

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  19. aK(2)Cr(2)O(7)+bKCl+cH(2)SO(4)rarrxCrO(2)Cl(2)+yKHSO(4)+zH(2)O The a...

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  20. The oxidation number of carbon in CH(2)Cl(2) is

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