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The oxidation number of Cr in Cr(CO(6))...

The oxidation number of Cr in `Cr(CO_(6))` is :

A

0

B

2

C

`-2`

D

`+6`

Text Solution

Verified by Experts

`overset(x)Croverset(CO_(6))` therefore O.N of Cr=0
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DINESH PUBLICATION-REDOX REACTIONS-Multiple Choice Question Bank(MCQB)
  1. The oxidation number of Cr in Cr(CO(6)) is :

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  2. Which of the following is not a redox reaction?

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  3. In the reaction 3Br(2)+6CO(3)^(2-)+3H(2)Orarr5Br^(ө)+BrO(3)^(ө)+6HCO...

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

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  5. The most powerful oxidising agent among the following is:

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  6. The oxidation state of iodine in H(4)IO(6)^(-) is:

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  7. The standard electrode potentials of elements A,B and C are+0.68, -2.5...

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  8. In the rection: 2Ag+2H(2)SO(4)rarrAg(2)SO(4)+2H(2)O+SO(2) Sulphuri...

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  9. Which of the following is a redox reaction?

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  10. Without losing its concentration, ZnCl(2) solution can't be kept in co...

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

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  12. The oxidation state of nitrogen in N(3)H is

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

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  14. Oxidation state of Fe in FeO(4) is:

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  15. In an acidic medium dichromate ion oxidises ferrous ion to ferric ion....

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  16. Which of the following statement is true for the electrochemical Danie...

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

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

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  19. Oxidation states of P in H(4)P(2)O(5),H(4)P(2)O(6),H(4)P(2)O(7) are:

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  20. When CI(2) gas reacts wioth hot and concentrated solution of sodium hy...

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