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Give one chemical reaction to show that ...

Give one chemical reaction to show that tin (II) is a reducing agent whereas `Pb` (II) is not .

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Due to inert paire effect tin exhibits two different oxidation states `1 +2` and `+4 .+4` oxidation state is more stabel tan `+2` hence tin (II) chloride behaves as a redcuing agent and osididses to tin (IV) chloride .
`overset ((+4)) (SnCl_2) + overset ((+2)) (2HgCl_2) rarr overset((+1)) (Hg _2 Cl_2) + overset ((+4)) (SnCl_4)` .
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