First and second ionisation enthalpies(in KJ/mol) of few elements are given below:

Which of the above elements will form halides with formula `MX_(2)`?

Options

A. (i) and (ii)
B. (i) and (iii)
C. (ii)and(iii)
D. (i) and (iv)

Answer

C

Explanation

(ii)is a reactive metal from second group,and (iii)is a reactive non-metal from `17^(th)` group.
For second group elements,the difference in successive IE is less.The compound formed will be `MX_(2)`