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Question

Balance the following redox reaction:
Cr++Sn4+Cr3++Sn2+

A
Cr++Sn4+Cr3++Sn2+
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B
3Cr++Sn4+Cr3++2Sn2+
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C
Cr++4Sn4+Cr3++2Sn2+
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D
Cr++4Sn4+3Cr3++2Sn2+
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Solution

The correct option is B 3Cr++Sn4+Cr3++2Sn2+
Cr++Sn4+Cr3++Sn2+
Oxidation-reduction method : Cr+Cr3++2eSn4++2eSn2+ oxidationreduction
Adding both equations,
Cr++Sn4+Cr3++Sn2+.

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