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which of the following is a redox reacti...

which of the following is a redox reaction ?

A

`NaCl+KNO_(3)rarrNaNO_(3)+KCl`

B

`CaC_(2)O_(4)+2HClrarrCaCl_(2)+H_(2)C_(2)O_(4)`

C

`Mg(OH)_(2)+2NH_(4)ClrarrMgCl_(2)+2NH_(4)OH`

D

`Zn+2AgCNrarr2Ag+Zn(CN)_(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
`ZnrarrZn^(2+)+2e^(-)`
`Ag^(o+)+e^(-)rarrAg`
In `(a), (b)` and `(c )`, oxidation number does not change.
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CENGAGE CHEMISTRY-REDOX REACTIONS-Exercises (Single Correct)
  1. The oxidation number of Cl in CaOCl(2) is

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  2. The equivalent weight of FeC(2)O(4) in the change FeC(2)O(4)rarrFe^(...

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  3. The oxidation state of Fe in Fe(3)O(8) is

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  4. In which of the following compounds, the oxidation state of transition...

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  5. The oxidation state of S in H(2)S(2)O(8) is

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  6. Which of the following is not a disproportionation reaction ?

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  7. Which of the following is a disproporationation reaction ?

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  8. When KMnO(4) acts as an oxidising agnet and ultimetely from MnO(4)^(2-...

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  9. which of the following is a redox reaction ?

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  10. The oxidation states of sulphur in the anions SO(3)^(2-), S(2)O(4)^(2-...

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  11. For decolourisation of 1 "mol of" KMnO(4), the moles of H(2)O(2) requi...

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  12. A metal ion M^(3+) loses three electrons , its oxidation number will b...

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  13. To an acidic solution of an anion, a few drops of Kmno(4) solution are...

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

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  15. Which of the following is not a reducing agent ?

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  16. The oxidation state of chromium is [Cr(PPh(3))(3)] is

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  17. The values of the x and y in the following redox reaction. xCl(2)+6o...

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  18. Which gas is evolved when PbO(2) is treated with conc HNO(3) ?

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  19. The equivalent mass of oxidising agent in the following reaction is ...

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  20. In alkaline medium, ClO(2) oxidises H(2)O(2) "to" O(2) and is itself r...

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