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In which one of the following changes th...

In which one of the following changes there are transfer of five electrons?

A

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

B

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

C

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

D

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

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The correct Answer is:
A
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AAKASH INSTITUTE-REDOX REACTIONS-Assignment (Section A) (Objective type Questions (one option is correct))
  1. In which of the following reactions, the underlined element has decrea...

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

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  3. In which one of the following changes there are transfer of five elect...

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  4. The oxidation states of the most electronegative elements in the produ...

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  5. The oxidation number of chlorine in HOCl is

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  6. In the reaction, Cl(2)+OH^(-)rarrCl^(-)+ClO(4)^(-1)+H(2)O, chlorine ...

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  7. The oxidation number of P in Mg(2)P(2)O(7) is

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  8. For the redox reaction, MnO(4)^(-) + C(2)O(4)^(2-) + H^(+) rarr Mn^(...

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  9. Oxygen has an oxidation state of +2 in

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  10. A compound contains three elements A,B and C, if the oxidation number ...

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  11. In which of the following pairs. the oxidation states, of sulphuric an...

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  12. The oxidation number of sulphur in S(8), S(2)F(2) and H(2)S respective...

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  13. Oxidation number of C in HNC is :

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  14. The oxidation number of Cl in CaOCl(2) is

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  15. Which of the following molecules can act as an oxidising agent as well...

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  16. The oxidation state of iodine in ICI(3) is

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  17. The pair of compounds having metals in their highest oxidation state i...

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  18. Consider a titration of potassium dichromate solution with acidified M...

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  19. Number of moles of MnO(4)^(-) required to oxidise one mole of ferrous ...

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  20. The reaction,P(4)+3NaOH+3H(2)O to 3NaH(2)PO(2)+PH(3) is an example of

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