WAEC Chemistry 2022 Paper

Concept:Boyle’s law relates the pressure and volume of a fixed mass of gas at constant temperature.Explanation:At constant temperature, $V \propto \frac{1}{P}$.So $PV = k$, where $k$ is a constant.As pressure increases, volume decreases.Therefore, the correct sketch is the rectangular hyperbola that shows this inverse relationship between pressure and volume.Answer:Option A — the graph showing pressure and volume varying inversely.