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Which of the following is a redox reacti...

Which of the following is a redox reaction ?

A

`2CuSO_(4)+4KI rarr Cu_(2)I_(2)+2K_(2)SO_(4)+I_(2)`

B

`SO_(2)+H_(2)O rarr H_(2)SO_(3)`

C

`Na_(2)SO_(4)+BaCl_(2) rarr BaSO_(4)+2NaCl`

D

`CuSO_(4)+4NH_(3) rarr [Cu(NH_(3))_(4)]SO_(4)`

Text Solution

Verified by Experts

The correct Answer is:
A
O.N of Cu decreass from +2 in `CuSO_(4)` to +1 in `Cu_(2)I_(2)` while that of iodine increases from -1 in KI to 0 to `I_(2)`
`:.` reaction (A) is a redox reaction.
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DINESH PUBLICATION-REDOX REACTIONS-Revision Question
  1. KMnO(4) is a strong oxidising agent in acidic medium. To provide acidi...

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  2. Which of the following is a set of reducing agents?

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  3. Which of the following is a redox reaction ?

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  4. Oxidation number if iodine in IO(3)^(-), IO(4)^(-),KI and I(2) respect...

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  5. MnO(4)^(-) ions are reduced in acidic conditions to Mn^(2+) ions where...

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  6. Which of the following reactions involve disproportionation ?

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  7. The reaction P(4)+3NaOH+3H(2)Orarr2NaH(2)PO(2)+PH(3) is an example of

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  8. Cr(2)O(5) has structure as shown The oxidation number of chromium...

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

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  10. In the following reaction: x KMnO(4)+y NH(3) rarr KNO(3)+MnO(2)+KOH+...

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  11. The brown ring complex compound of iron is formulated as [Fe (H(2)O)(5...

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  12. The equivalent mass of potassium permanganate in alkaline medium is

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  13. In which of the following reactions, there is no change in valency ?

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

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  15. The oxidation states of S atoms in S(2)O(6)^(2-) from left to right re...

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  16. Small quantities of compounds TX, TY and TZ are put into separate test...

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  17. The oxidation number of sulphur in H(2)SO(4),H(2)S(2)O(4) and H(2)S(2)...

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  18. Which of the following has//have been arranged in order of decreasing...

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  19. Which of the following species can functon as an oxidising as well as ...

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  20. Oxidation no. of P in H(4)P(2)O(5), H(4)P(2)O(6), and H(4)P(2)O(7) are...

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