Gas Laws and Properties Quiz

Liquefaction of gases is achieved by: (a) increasing the pressure and decreasing the temperature. (b) decreasing the pressure and increasing the temperature. (c) adding a catalyst to the gas. (d) exposing the gas to ultraviolet radiation.

• increasing the pressure and decreasing the temperature

• decreasing the pressure and increasing the temperature

• adding a catalyst to the gas

• exposing the gas to ultraviolet radiation

According to Boyle's Law, at constant temperature: (a) the pressure and volume of a gas are directly proportional. (b) the pressure and volume of a gas are inversely proportional. (c) the pressure and volume of a gas are independent. (d) the volume of a gas remains constant.

• the pressure and volume of a gas are directly proportional

• the pressure and volume of a gas are inversely proportional

• the pressure and volume of a gas are independent

• the volume of a gas remains constant

The pressure cooker works because: (a) the increased pressure increases the boiling point of water. (b) the sealed container traps steam, promoting faster cooking. (c) the hot water inside generates electricity for cooking. (d) the pressure cooker is made of a special material that conducts heat evenly.

• the increased pressure decreases the boiling point of water

• the sealed container traps steam, promoting faster cooking

• the hot water inside generates electricity for cooking

• the pressure cooker is made of a special material that conducts heat evenly

Graham's Law of Diffusion states that the rate of diffusion of a gas is inversely proportional to the square root of its: (a) density (b) pressure (c) volume (d) molecular mass

• density

• pressure

• volume

• molecular mass

Charles' Law states that at constant pressure: (a) the volume of a gas is directly proportional to its temperature. (b) the volume of a gas is inversely proportional to its temperature. (c) the pressure of a gas is directly proportional to its temperature. (d) the pressure of a gas is inversely proportional to its temperature.

• the volume of a gas is directly proportional to its temperature

• the volume of a gas is inversely proportional to its temperature

• the pressure of a gas is directly proportional to its temperature

• the pressure of a gas is inversely proportional to its temperature

Which of the following gases has the highest rate of diffusion at room temperature? (a) Hydrogen (H₂) (b) Helium (He) (c) Carbon dioxide (CO₂) (d) Oxygen (O₂)

• Hydrogen (H₂)

• Helium (He)

• Carbon dioxide (CO₂)

• Oxygen (O₂)

Which of the following is NOT a property of a real gas? (a) Its molecules have some volume. (b) Its molecules attract each other slightly. (c) Its pressure and volume are always inversely proportional. (d) Its behavior deviates slightly from the ideal gas law at high pressures and low temperatures.

• Its molecules have some volume

• Its molecules attract each other slightly

• Its pressure and volume are always inversely proportional

• Its behavior deviates slightly from the ideal gas law at high pressures and low temperatures

Gases are mostly: (a) compressible and occupy a fixed volume. (b) compressible and occupy the entire container. (c) incompressible and occupy a fixed volume. (d) incompressible and occupy the entire container.

• compressible and occupy a fixed volume

• compressible and occupy the entire container

• incompressible and occupy a fixed volume

• incompressible and occupy the entire container

The average kinetic energy of gas molecules: (a) increases with decreasing temperature. (b) remains constant at all temperatures. (c) increases with increasing temperature. (d) depends on the type of gas only.

• increases with decreasing temperature

• remains constant at all temperatures

• increases with increasing temperature

• depends on the type of gas only

The mean free path of a gas molecule is the average distance it travels between collisions. Which of the following factors will increase the mean free path? (a) Higher pressure (b) Smaller container volume (c) Lower temperature (d) Larger molecule size

• Higher pressure

• Smaller container volume

• Lower temperature

• Larger molecule size