Question:
Acidic dichromate ion reacts with hydrogen peroxide to the formation of deep blue colour. This is due to the formation of
Acidic dichromate ion reacts with hydrogen peroxide to the formation of deep blue colour. This is due to the formation of
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Blue colour in chromium reactions usually indicates peroxo complex formation.
Updated On: Apr 16, 2026
- CrO$_4$
- CrO$_5$
- Both (a) and (b)
- None of (a) and (b)
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The Correct Option is B
Solution and Explanation
Concept:
Hydrogen peroxide forms peroxo complexes with transition metals.
Step 1: Reaction.
Dichromate reacts with H$_2$O$_2$ in acidic medium.
Step 2: Product formed.
Blue coloured compound is peroxo complex CrO$_5$.
Step 3: Conclusion.
Correct answer is (B)
Step 1: Reaction.
Dichromate reacts with H$_2$O$_2$ in acidic medium.
Step 2: Product formed.
Blue coloured compound is peroxo complex CrO$_5$.
Step 3: Conclusion.
Correct answer is (B)
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