Solid Lead nitrate is dissolved in `1` litre of water.The solution was found to boil at `100.15^(@)C`.When `0.2` mol of `NaCl` is added to the resulting solution, it was observed that the solution froze at `-0.8^(@)C`.The solubility product of `PbCl_(2)` formed is________ `xx 10^6` at `298K`. (Nearest integer)
Given: `K_(b)`=0.5 K kg `mol^(-1)` and `K_(f)`=1.8 K k g `mol^(-1)`.Assume molality to be equal to molarity in all cases.