which cation will have greater polarizing power pb2+or pb4+
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The correct option would be (2) that is Pb4+ and Br-. This happens because if you refer to the FAJAN's rule, according to which ,cation with high charge to radius ratio posses more polarising power. It means the cation with a high charge and a smaller radius is more polarising. So Pb2+ and Fe2+ are out.
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