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Which of the following is a redox reaction?

...

Which of the following is a redox reaction?

A.

KCI(aq) + H2SO4(aq) → KHSO4(aq) + HCI(aq)

B.

2FeBr2(aq) + Br4(aq) → 2FeBr3(aq)

C.

3AgNO(aq) + FeCl3(aq) → 3AgCl(aq) + Fe(NO3)3(aq)

D.

H2CO3(aq) → H2O(I)2- + CO2(g)

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Correct answer is B

No explanation has been provided for this answer.

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