Which of the following relations is correct for a reaction $\text{S}_{(s)} + \text{O}_{2(g)} \rightarrow \text{SO}_{2(g)}$ ?

The solubility product of a sparingly soluble salt BA is $6.4 \times 10^{-13}$. Calculate it's solubility in $\text{g dm}^{-3}$ .
Molar mass of salt is $190\ \text{g mol}^{-1}$ .

The solubility of AgCl in 0.1 M NaCl is S mol/L. If the solubility product of AgCl is $1.8 \times 10^{-10}$, then S is approximately:

Identify from following a weak electrolyte based on their dissociation nature in aqueous medium.