1.

The correct values of ionization enthalpies (in kJ "mol"^(-1)) of Si, P, Cl and S respectively are :-

Answer»

786, 1012, 999, 1256
1012, 786, 999, 1256
786, 1012, 1256, 999
786, 999, 1012, 1256

Solution :ORDER of IE
`underset(3s^(2)3P^(2))(SI) lt underset(3s^(2)3p^(3))(P) lt underset(3s^(2)3p^(4))(S) lt underset(3s^(2)3p^(5))(Cl)`
`underset(1256)(Cl) gt underset(1012)(P) gt underset(999)(S) gt underset(786)(Si)`


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