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Reduction never involves:...

Reduction never involves:

A

gain of electrons

B

decrease in oxidation number

C

loss of electrons

D

decrease in valency of electropositive component

Text Solution

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The correct Answer is:
C
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A reduction reaction involves

Oxidation and reduction process involves the transaction of electrons. Loss of electrons is oxidation and the gain of electrons is reduction. It is thus obvious that in a redox reaction, the oxidant is reduced by accepting the electrons and the reductant is oxidised by losing electrons. The reactions in which a species disproportionates into two oxidation states (lower and higher) are called disproportionation reactions. In electrochemical cells, redox reaction is involved, i.e., oxidation takes place at anode and reduction at cathode. Select the correct statement:

Oxidation and reduction process involves the transaction of electrons. Loss of electrons is oxidation and the gain of electrons is reduction. It is thus obvious that in a redox reaction, the oxidant is reduced by accepting the electrons and the reductant is oxidised by losing electrons. The reactions in which a species disproportionates into two oxidation states (lower and higher) are called disproportionation reactions. In electrochemical cells, redox reaction is involved, i.e., oxidation takes place at anode and reduction at cathode. Which of the following reactions is/are correctly indicated?

Reduction involves

OP TANDON-OXIDATION AND REDUCTION (REDOX REACTIONS)-LEVEL A
  1. The oxidation number of C in CH(4),CH(3)CI,CH(2)CI(2),CHCI(3) "and" ...

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  2. Which of the following statements is correct

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  3. Reduction never involves:

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  4. In which of the following reactions have the underlined substance been...

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  5. In which of the following reactions, the underlined element has decrea...

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  6. Select the compound in which chlorine is assigned the oxidation number...

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  7. Phosphorus has the oxidation state +3 in

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  8. Oxidation number of P in PO(4)^(3-), of S in SO(4)^(2-) and that of Cr...

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  9. The highest oxidation state of Mn is shown by

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  10. Oxidation number of P in Ba(H(2)PO(2))(2) is

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

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  12. Following reaction describes the rusting of iron 4Fe+3O(2) rarr 4Fe^...

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  13. In the reaction of sodium thiosulphate with 12 in aqueous medium the e...

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  14. The oxidation number of chlorine in HOCI is:

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

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  16. The oxidation number of arsenic atom in H(3)AsO(4) is :-

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  17. In which one of the following reactions, hydrogen is acts as an oxidis...

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

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

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  20. The oxidation number of phosphorus in PO(4)^(3-), P(4)O(10), and P(2)O...

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