What would be the volume of water required to dissolve $$0.2 \mathrm{~g}$$ of $$\mathrm{PbCl}_2$$ of molar mass $$278 \mathrm{~g} / \mathrm{mol}$$ to prepare a saturated solution of the salt? $$(\mathrm{K}_{\mathrm{SP}}$$ of $$\mathrm{PbCl}_2=3.2 \times 10^{-8})$$

pH of 10$$^{-3}$$ M solution of KOH is

Hydroxyl ion concentration of 1M HCl is

Which of the following salts on being dissolved in water gives pH > 7 at 25$$^\circ$$C ?