WAEC Chemistry 2016 Paper

Concept:The equation $\frac{PV}{T} = K$ is derived by combining Boyle's law and Charles' law.Explanation:Boyle's law states that at constant temperature, $PV = K_1$.Charles' law states that at constant pressure, $\frac{V}{T} = K_2$.When both temperature and pressure are allowed to change, these relationships combine into $\frac{PV}{T} = K$.Graham's law deals with rates of diffusion, and Dalton's law deals with partial pressures, neither combining with Boyle's law to give this equation.Answer:A. Boyle's and Charles' laws