1.

Which of the following transformation least energy is required?

Answer»

`F_((g))^(-)to F_((g))+e^(-)`
`P_((g))^(-) to P_((g))+e^(-)`
`S_((g))^(-) to S_((g))+e^(-)`
`Cl_((g))^(-) to Cl_((g))+e^(-)`

Solution :If we consider the oppsite process:
`P_((g))+e^(-) to P_((g))^(-),""DeltaH_(2)`
Order of energy releases is `:DeltaH_(4) GT DeltaH_(1) gt DeltaH_(3) gt DeltaH_(2)`.
so, `P_((g))^(-) to P_((g))+e^(-),`Requires least energy.


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