Cr₂O₇^2-_(aq) + 14H⁺_(aq) + 6l^-_(aq) → 2Cr³⁺_(aq) + 3l_(g) + 7H₂O_(I).
The change in the oxidation number of oxygen in the equation above is?

A.

0

B.

1

C.

2

D.

7

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Correct answer is A

No explanation has been provided for this answer.

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