To an acidified dichromate solution, a pinch of $N a_{2} O_{2}$ is added and shaken. What is observed?

Blue color.

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Orange color changing to green directly.

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Copious evolution of oxygen.

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Bluish-green precipitate.

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Solution

The correct options are
A Blue color.
C Copious evolution of oxygen.
Colour of acidified dichromate solution changes to blue (due to formation of Cr salts).

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Similar questions

To an acidified dichromate solution, a pinch of Na₂O₂ is added and shaken. What is observed?

To an acidified dichromate solution, Na₂O₂ is added and shaken. What is observed?

H_{2} O_{2}

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