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Which of the following involves gain of ...

Which of the following involves gain of five electrons ?

A

`MnO_(4)^(-) rarr Mn^(2+)`

B

`CrO_(4)^(2-) rarr Cr^(3+)`

C

`MnO_(4)^(2-) rarr MnO_(2)`

D

`Cr_(2)O_(7)^(2-) rarr 2Cr^(3+)`

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The correct Answer is:
A
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TARGET PUBLICATION-REDOX REACTIONS-CRITICAL THINGKIN
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  2. The pair of compounds having metals in their highest oxidation state i...

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  3. The oxidation number of Mn is +7 in

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  4. In the reaction, 4Zn + NO(3)^(-) + 7H(2)O rarr 4Zn^(2+) + NH(4)^(+) ...

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  5. In which of the folowing rection nitrogen is not reduced ?

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  6. Which of the following involves gain of five electrons ?

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  7. Which among the following is a redox reaction ?

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  8. In which of the following reactions, the underlined substance has been...

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  9. Which substance is serving as a reducing agent in the following reacti...

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  10. Nitric oxide acts as a reducing agent in which of the following reacti...

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  11. In a reaction between zinc and iodine in which zinc iodide is formed, ...

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  12. In the reaction 8Al+3Fe(3)O(4)rarr 4Al(2)O(3)+9Fe the number of el...

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  13. In the reaction: Cr(2)O(7)^(2-) + 14H^(o+) + 6I^(Ө) rarr2Cr^(3+) + 3...

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  14. Consider the following reactions, C(2) H(6)(g) + nO(2) rarr CO(2) (g...

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  15. "" is used as an oxidizing agent to bleach dark hair by a redox reacti...

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  16. Which of the following CORRECTLY represents the reactions occuring in ...

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  17. The overall effect of respiration is similar to that of "".

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  18. The violent reaction between sodium and water is an example of "".

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  19. Hydrogen acts as an oxidizing agent when it is reacted with "".

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  20. Which of the following is a redox reaction ?

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