Q. $1\times10^{-5}\ \mathrm{M\ AgNO_3}$ is added to $1\ \mathrm{L}$ of saturated solution of $\mathrm{AgBr}$. The conductivity of this solution at $298\ \mathrm{K}$ is _______ $\times10^{-8}\ \mathrm{S\ m^{-1}}$. [Given : $\mathrm{K_{sp}(AgBr)}=4.9\times10^{-13}$ at $298\ \mathrm{K}$ $\lambda^0_{\mathrm{Ag^+}}=6\times10^{-3}\ \mathrm{Sm^2\ \ mol^{-1}}$ $\lambda^0_{\mathrm{Br^-}}=8\times10^{-3}\ \mathrm{Sm^2\ \ mol^{-1}}$ $\lambda^0_{\mathrm{NO_3^-}}=7\times10^{-3}\ \mathrm{Sm^2\ \ mol^{-1}}$]