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Both oxidation and reduction takes place...

Both oxidation and reduction takes place in

A

`NaBr + HCl to NaCl + HBr`

B

`HBr + AgNO_(3) to AgBr + HNO_(3)`

C

`H_(2) + Br_(2) to 2HBr`

D

`CaO + H_(2)SO_(4) to CaSO_(4) + H_(2)O`

Text Solution

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The correct Answer is:
A
Both oxidation and reduction are taking place in the following reaction.

`H_(2)`- reducing agent, `B_(2)`-oxidising agent.
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Redox is a reaction in which both oxidation and reduction will take place simultaneously . It is obvious that if one substance gives electron there must be another substance to accept these electrons . In some reactions, same substance is reduced as well as oxidised, these reactions are termed as disproportionation reactions. For calculating equivalent mass in redox reaction change in oxidtaion number is realted to n-factor which is reciprocal of molar ratio. Which of the following is an example of redox reaction ?

MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-REDOX REACTIONS-Exercise 2
  1. Hot concentrated sulpuric acis is a moderatly strong oxidizing agent. ...

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  2. Choose the disproportionation reaction among the following redox react...

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  3. In which of the following reactions, H(2)O(2) acts as a reducing agent...

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  4. Observe the following reaction, 2NO(2)(g) + 2OH^(-)(aq) to NO(3)^(-)...

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  5. In acidic medium, H(2)O(2) changes Cr(2)O(7)^(2-) to CrO(5) which has ...

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  6. The oxidation number of Cr in K(2)Cr(2)O(7) is

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  7. Oxidation number of sulphur in Na(2)S(2)O(3) is

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  8. Both oxidation and reduction takes place in

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  9. The oxidant which cannot act as a reducing agent is

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  10. In the reaction Ag(2)O+H(2)O(2) rarr 2Ag+H(2)O+O(2),H(2)O(2) acts as

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

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  12. Which of the following is the example of a disproportionation reaction...

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  13. Which combination appears odd with respect to oxidation number per ato...

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

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  15. In which of the following, increasing orders the oxidation number of o...

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  16. In the reaction 3Br(2) + 6CO(3)^(2-) + 3H(2)O to 5Br^(-) + 2BrO(3)^(...

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  17. MnO(4)^(-) is a good oxidising agent in different medium changing to ...

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  18. The reaction, 10FeSO(4) + 2KMnO(4) + 8H(2)SO(4) to 2MnSO(4) + 5Fe(2)...

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  19. Which of the following is a redox reaction?

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  20. Given, xNa(2)HAsO(3) + y NaBrO(3) + z HCl to NaBr + H(3) AsO(4) + NaCl...

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