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Oxidation number of chromium in potassiu...

Oxidation number of chromium in potassium dichromate is

A

6

B

-5

C

-2

D

2

Text Solution

Verified by Experts

The correct Answer is:
A
(a) Let x = oxidation no. of Cr in `K_2Cr_2O_7`
`therefore (2 xx 1)+(2 xx x) +7(-2)=0`
or 2 +2x - 14 =0 or x= +6.
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DISHA PUBLICATION-REDOX REACTIONS-EXERCISE-1 : CONCEPT BUILDER ( TOPICWISE )
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  2. Match the columns

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  3. Oxidation number of chromium in potassium dichromate is

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  4. Phosphorus has the oxidation state +3 in

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  5. A compound contains atoms A, B and C. the oxidation number of A is +2,...

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  6. The brown - ring complex compound of iron is formulated as [Fe(H2O)5(N...

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  7. The oxidation number of sulphur in S2F2, H2S respectively, are

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  8. The oxidation number of cobalt in K [Co(CO)(4)] is

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  9. Oxidation number ofnitrogen in (NH4)2SO4 is

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  10. In which of the following compounds iron has lowest oxidation state?

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  11. In which of the compounds does 'maganese' exhibit highest oxidation nu...

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  12. On reduction of KMnO(4) by oxalic acid in acidic medium, the oxidation...

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  13. Among the following, identify the species with an atom in +6 oxidatio...

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  14. The oxidation state of chromium in the final product formed by the rea...

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  15. in which of the following transition metal complexes does the metal ex...

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  16. In which of the following compounds , the oxidation number of iodine i...

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  17. The oxide which cannot act as reducing agent is

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  18. The oxidation number of an element in a compound is evaluated on the b...

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

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  20. Which of the following statements is not correct?

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