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Which of the following are redox reactio...

Which of the following are redox reactions?

A

`1/2 H_2 +1/2 I_2 to HI`

B

`PCl_5 to PCl_3 +Cl_2`

C

` 2CuSO_4 + 4KI to Cu_2 I_2 +2K_2 SO_4 +I_2`

D

` CaOCl_2 to Ca^(2+) +Ocl^(-) +Cl^(-)`

Text Solution

Verified by Experts

The correct Answer is:
A, B, C

Except (iv), there occurs a change in O.S. of the reactants and products. Hence all other are redox reactions.
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BRILLIANT PUBLICATION-REDOX REACTIONS-LEVEL -III
  1. Which of the following reactions should be balanced in basic medium?

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  2. For the reaction: I^(-) +CIO(3)^(-) +H2 SO4 to Cl^(-) +HSO(4)^(-...

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  3. Which of the following are redox reactions?

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  4. H2 C2 O4 and NaHC2 O4 behave as.acids as well as reducing agents. Whi...

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  5. Which of the following statements are correct?

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  6. When the following half-reaction is balanced: CN^(-) to CNO^(-) Which...

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  7. When the following redox reaction is balanced in basic medium, MnO(4)^...

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  8. Consider the following redox reaction:KMnO4 + Na2 S2 O3 +H^(+) to Mn^...

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  9. Which of the following can be oxidized further with a strong oxidising...

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  10. Consider the following reaction: CuSO4 +KI+H^(+) Cul(s)+I2 +K2 SO4 Wh...

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  11. Which of the following are disproportionation reaction:

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  12. For the reaction I^(-) +CIO(3)^(-) +H2 SO4 to Cl^(-) +HSO(4)^(...

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  13. If 2.68 xx 10^(-3) mol of a solution containing an ion A^(n+) requires...

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  14. The brown ring complex compound is formulated as [Fe(H2 O)5 NO]SO4 The...

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  15. In the following reaction: XZn + yHNO3 (dil) to aZn(NO3)2 + bH2O+cNH...

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  16. The difference in the oxidation numbers of two types of sulphur atoms ...

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  17. The number of moles of KmnO(4) reduced by 1 mol of Kl in alkaline medi...

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  18. In the following reaction, M^(x+)+MnO4^(-) to MO3^(-) +Mn^(2+)+1/2 O...

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  19. The number of electrons lost in the following change is: Fe+H2 O to Fe...

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  20. Match the reactions in column I with their respective characteristics ...

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