iGCSE solids, liquids and gases

Which of the following statements best describes the motion of gas particles?

• They are ordered and all move in one direction.

• They have a rhythmical motion.

• They move in a random motion.

• They do not move.

Which of the following statements correctly describes how gas particles create pressure?

• Gas particles do not create pressure, it just exists.

• Gas particles collide with their container exerting a force on the walls.

• Gas particles have pressure and they pass this on to the container.

• None of the above.

Which of the following is a property of a gas?

• Gases can be compressed/squashed.

• Gas molecules have an ordered arrangement.

• Gas molecules move very slowly.

• Gases have a very high density.

Which of the following equations represents Boyle’s law?

• p1V1 = p2/V2

• p1V1 = p2V2

• p1/V1 = p2/V2

• P×V=1/V

A balloon contains 0.075 m³ of gas. The pressure is reduced to 100 kPa and fills a box of 0.45 m³. What is the initial pressure inside the balloon if the temperature remains constant?

• 17 kPa

• 600 kPa

• 3.3 kPa

• 100 kPa

Boyle discovered that if you keep cooling gas there is a temperature where the pressure is almost zero. At what temperature does this happen?

• 273°

• 0°

• −273°

• 293°

A scientist is required to convert 25°C into the Kelvin temperature scale. Which of the following is correct?

• −298 K

• 298 K

• 25 K

• −248 K

For a fixed mass of gas at constant volume, what is the relationship between pressure and temperature?

• T1P1 = T2P2

• p2T2 = pT

• p1/T1 = p2/T2

• p×T=V

A canister is filled with propane gas. It is placed under a pressure of 152 kPa in a refrigerated area at 0°C. The canister is then stored outside. On a hot day, the temperature rises to 30°C. What is the new pressure of the gas?

• 544 kPa

• 137 kPa

• 152 kPa

• 169 kPa

At sea level, atmospheric pressure is 101 kPa when the air temperature is approximately 20°C. What is the temperature at the top of Mount Everest if the pressure is 34 kPa?

• 99 K

• 12 K

• 200 K

• 307 K