(a) Which of the following species has greater polarising power ?
`(i) Fe^(3+)or Fe^(2+) (ii) Cu^(2+) or Na^(+) (iii) Mg^(2+) or Al^(3+).`
(b) Which of the following species is most susceptible to polarisation ?
`(i) Br^(-)orI^(-)(ii)O^(2-)or S^(2-)(iii) N^(3-)orO^(2-)`

Explanation

The examplation is based on Fazan's rules For details, consult section 4.15
`(a)(i)Fe^(3+) (ii)Cu^(2+) (iii)Al^(3+) (b) (i)I^(-) (ii)S^(2-)(iii)N^(3-)`