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In alkaline H(2)O(2),Cr(2)O(7)^(2-) chan...

In alkaline `H_(2)O_(2),Cr_(2)O_(7)^(2-)` changes to tetraperoxo species… having oxidation number of Cr as …

A

`CrO_(4)^(2+),6`

B

`Cro_(5),6`

C

`CrO_(8)^(3-),5`

D

`CrO_(8)^(3-),11`

Text Solution

Verified by Experts

The correct Answer is:
C
Tera peroxo species `[Cr(O_(2))_(4)]^(3-)`
oxidation number of `Cr=x-8=-3x=+5`
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-D - AND F-BLOCK ELEMENTS-Practice exercise (Exercise 1)
  1. On heating KMnO(4), one among the following is not formed:

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  2. KMnO(4) forms dark purple crystals, which are isostructural with those...

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  3. In alkaline H(2)O(2),Cr(2)O(7)^(2-) changes to tetraperoxo species… ha...

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  4. K(2)Cr(2)O(7)//H^(+) changes to green by

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  5. An explosion takes place when conc. H2SO4 is added to KMnO4. Which of ...

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  6. The outer electronic configuration of Gd (At.No. 64) is

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  7. Identify the incorrect statement among the following.

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  8. The atomic size of cerium and promethium is quite close, because

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  9. The lanthanide contraction relates to

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  10. Because of lanthnoid contraction, which of the following pairs of elem...

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  11. Ln^(3+) (trivalent lanthanides ions ) have electronic configuration.

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  12. The basicity of lanthanoid hydroxides, across the lanthanoid series

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  13. There are 14 elements in actinoid series. Which of the following eleme...

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  14. lanthanoid contraction, the unique in the chemistry of lanthanoids, is...

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  15. Misch metal is

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  16. Consider the following statements, (I) La(OH)(3) is the least basi...

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  17. Which one of the following exists in the oxidation state other than +3...

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  18. The radius of La^(+) (at no 57) is 1.06Å. What may be the radius of Lu...

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  19. Lanthanoid contraction is caused due to:

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  20. Match the Column and choose the correct option from codes given below.

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