1.

The reducing power of divalent species decreases in the order

Answer»

`GegtSngtPb`
`SngtGegtPb`
`PbgtSngtGe`
`PbgtGegtSn`

SOLUTION :`UNDERSET("LESS stable")(GE^(+2))tounderset("more stable")(Ge^(+4))`
`underset("more stable")(Pb^(+2))tounderset("less stable")(Pb^(+4))`
`underset("more stable")(Sn^(+2))tounderset("less stable")(Sn^(+4))`


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