$A$ precipitate of calcium oxalate $(CaC_2O_4)$ will not dissolve in which of the following?

Consider the following salts: $NaCl, HgCl_{2}, Hg_{2}Cl_{2}, CuCl_{2}, CuCl$ and $AgCl$. Identify the correct set of insoluble salts in water.

$K_{sp}$ of a salt $Ni(OH)_2$ is $2 \times 10^{-15}$,then molar solubility of $Ni(OH)_2$ in $0.01 \ M \ NaOH$ is $:-$

$PbCl_2$ has a maximum concentration of $1.0 \times 10^{-3} \ M$ in its saturated aqueous solution at $25 \ ^oC$. Its solubility in a $0.1 \ M \ NaCl$ solution will be:

Which of the following compounds is sparingly soluble in ammonia?

At $298 \ K$ temperature,the solubility product $(K_{sp})$ for $AgCl$ is $1.5 \times 10^{-10}$. Calculate its solubility in $g \ L^{-1}$ in pure water. (Molar mass of $AgCl = 143.5 \ g \ mol^{-1}$)