$AgN{O}_3\left(aq\right)$ was added to an aqueous $KCl$ solution gradually and the conductivity of the solution was measured. The plot of conductivity $\Lambda$ versus the volume of $AgN{O}_3$ is

$AgN{O}_3+KCl\left(aq\right)\to AgCl\left(s\right)+KN{O}_3.\left(aq\right)$  Initially there is aq. KCl solution now as solution of $AgN{O}_3$ is added,  $AgCl\left(s\right)$ is formed. Hence conductivity of solution is almost compensated (or slightly increase) by the formation of $KN{O}_3$. After end point conductivity increases more rapidly because addition of excess $AgN{O}_3$ solution.