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Which of the following reactions involve...

Which of the following reactions involves oxidation-reduction ?

A

`NaBr+Hclrarr NaCl+HBr`

B

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

C

`2NaOH+H_(2)SO_(4)rarrNa_(2)SO_(4)+2H_(2)O`

D

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

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The correct Answer is:
D
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ALLEN-REDOX REACTIONS-EXERICSE - 2
  1. Oxidation number of ‘N’ in N3H (hydrazoic acid) is :

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  2. Phosphorus has the oxidation state of +3 in

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  3. Which of the following reactions involves oxidation-reduction ?

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  4. Which one is the oxidising agent in the reaction given below 2CrO(4)...

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

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  6. In substance Mg(HXO(3)), the oxidation number of X is :-

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  7. In the following change 3Fe+4H2OrarrFe3O4 +4H2 If the atomic weight of...

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  8. In the course of a chemical reaction an oxidant -

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  9. Which statement is wrong?

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  10. Identify the correct statement with respect to the following reaction,...

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  11. Which of the following reactions involves neither oxidation nor reduct...

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  12. In the reaction :- C+4HNO(3)rarrCO(2)+2H(2)O+4NO(2) HNO(3) acts as...

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  13. In the following reaction the value of 'X' is H(2)O+SO(3)^(2-)rarr S...

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  14. The oxidation number of P in KH(2)PO(3) is ..........

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  15. The oxidation number of iron in potassium ferricyanide [K(3)Fe(CN)(6)]...

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  16. The oxidation number of phosphorus in PH(4)^(+),PO(2)^(3-),PO(4)^(3-) ...

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  17. Which of the following compounds are arranged in increasing oxidation ...

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  18. Iodine shows the highest oxidation state in the compound :-

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  19. The number of electrons required to balance the following equation are...

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  20. Cr(2)O(7)^(-2)+I^(-)+H^(+)rarrCr^(+3)+I(2)+H(2)O The equivalent weig...

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