Gas Laws - Mixed Practice Questions Multiple Choice Questions 1. The fundamental assumption of Avogadro's Law is that: A) All gases have identical molecular weights B) Equal volumes of gases contain equal numbers of molecules C) Gases always expand when heated D) Pressure remains constant in all reactions 2. According to Charles's Law, what happens to the volume of a gas when temperature increases (at constant pressure)? a) Volume increases b) Volume decreases c) Volume stays the same d) Volume becomes zero 3. Boyle's Law states that pressure and volume are: a) Directly proportional b) Inversely proportional c) Not related d) Always equal 4. At constant volume, if you double the temperature of a gas (in Kelvin), what happens to the pressure? a) Doubles b) Halves c) Stays the same d) Becomes zero 5. Which temperature scale must be used when calculating gas law problems? a) Celsius b) Fahrenheit c) Kelvin d) Rankine True or False Questions 1. As temperature increases gas particles move faster. 2. According to Gay-Lussac's Law, pressure and temperature are inversely proportional. 3. The volume of a gas will decrease if its temperature decreases at constant pressure. 4. Boyle's Law only works if temperature remains constant. 5. Gas pressure increases when the container volume increases at constant temperature.