The values of K_sp of two sparingly soluble salts Ni(OH)₂ and AgCN are 2.0 × 10^–15 and 6 × 10^-17 respectively.
The more soluble salt is-

1. Ni(OH)₂ is more soluble than AgCN
2. AgCN is soluble in than Ni(OH)₂
3. Both have similar solubility
4. None of the above

The molar solubility of Ni(OH)₂ in a solution containing 0.10 M NaOH, given that the ionic product of Ni(OH)₂ is 2.0 × 10–15, is:

1. 2.0 × 10^–13 M
2. 2.0 × 10^–12 M
3. 2.0 × 10^–11 M
4. 2.0 × 10^–16 M