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Which of the following reactions is a redox reaction? (a) K2CrO4 + BaCl2 . BaCrO4 + 2KCl (b) Pb22+ + 2Br- . PbBr (c) Cu + S . CuS

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Which of the following reactions is a redox reaction? (a) K<sub>2</sub>CrO<sub>4</sub> + BaCl<sub>2</sub> . BaCrO<sub>4</sub> + 2KCl (b) Pb22+ + 2Br- . PbBr (c) Cu + S . CuS






 
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