The formation constant (log K1) of metal ions Xn+, Ym+ and ZP+ with halides in water is given below.
| Metal ion | F- | Cl- | Br- |
| Xn+ | 6.0 | 1.5 | 0.5 |
| Ym+ | 1.0 | 6.5 | 13.0 |
| ZP+ | 0.5 | 8.5 | 15.5 |
Consider the following statements
A. Xn+ is a hard acid; Ym+ is a soft acid
B. Xn+ is a soft acid; ZP+ is a hard acid
C. Ym+ is a soft acid; ZP+ is a soft acid
The correct option is
1
A and C only
2
A, B and C only
3
B and C only
4
A only