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Redox Reactions question

2014 · Q84
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Redox Reactions question

2014 · Q84

NEETChemistryRedox ReactionsMCQ+4 / −1
In acidic medium, H2O2 changes Cr2O72- to CrO5 which has two

(−-−O−-−O−-−) bonds. Oxidation state of Cr in CrO5 is
  1. A
    +5
  2. B
    +3
  3. C
    +6
  4. D
    −-−10
View written solutionFree

Correct answer: C

CrO5 has butterfly structure having two peroxo bonds.

AIPMT 2014 Chemistry - Redox Reactions Question 17 English Explanation


Peroxo oxygen has –1 oxidation state.

Let oxidation state of Cr be ‘x’

CrO5 : x + 4(–1) + 1 (–2) = 0

⇒\Rightarrow⇒ x = +6

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