1.

The value of II^(nd)Delta_(eg)H of O & S respectively in KJ/mole :-

Answer»

`+580, +780`
`+780, +580`
`+580, –780`
` –780, –580`

SOLUTION :`X_(p) = (I_(p)+EA)/(125) "KCAL mole"^(-1) , X_(p)=(275 +86)/(125)=2.8`


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