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To an acidified dichromate solution, a pinch of `Na_(2)O_(2)` is added and shaken. What is observed ?

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To an acidified dichromate solution, a pinch of `Na_(2)O_(2)` is added and shaken. What is observed ?
A. Blue colour
B. Orange colour changing to oxygen
C. Copious evolution of oxygen.
D. Bluish-green precipitate.
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Correct Answer - A::C
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