1.

PbCI_(2) exists white PbBr and PbI do not exist.

Answer»

Solution : `Pb^(4+)` is an oxidizing agent and readily changes into `Pb^(2+)` The Br’ and I ions are reducing agents. The redox REACTION occurs indicating that `PbBr_(4)` and `Pbl_(4)` are UNSTABLE compounds
`Pb^(4+)+4BrtoPbBr_(2)Br_(2)`


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