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

Options

A. 786, 1012, 999, 1256
B. 1012, 786, 999, 1256
C. 786, 1012, 1256, 999
D. 786, 999, 1012, 1256

Answer

C

Explanation

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)`