If the solubility product of $AB_2$ is $4 \times 10^{-12}$,then its solubility is .......?

The solubility product of $AgI$ at $25\,\text{°C}$ is $1.0 \times 10^{-16}\,\text{mol}^2\,\text{L}^{-2}$. The solubility of $AgI$ in $10^{-4}\,\text{N}$ solution of $KI$ at $25\,\text{°C}$ is approximately (in $\text{mol L}^{-1}$)

The solubility of $AgBr$ is $7.1 \times 10^{-7} \ mol \ dm^{-3}$. Calculate its solubility product at the same temperature.

In which of the following is the solubility of $AgCl$ maximum?

$A$ solution containing $0.01 \ M \ Zn^{2+}$ and $0.01 \ M \ Cu^{2+}$ is saturated with $H_2S$ gas. The concentration of $S^{2-}$ is $8.1 \times 10^{-21} \ M$. Given that the $K_{sp}$ values for $ZnS$ and $CuS$ are $3.0 \times 10^{-22}$ and $8.0 \times 10^{-36}$ respectively,which of the following will occur in the solution?

The solubility of a sparingly soluble salt $A_x B_y$ in water at $25\,^{\circ}C$ is $1.4 \times 10^{-4} \ M$. The solubility product is $1.1 \times 10^{-11}$. The values of $x$ and $y$ may be