Practice Questions on Matter

Which of the following is NOT a property of matter in a solid phase?

The particles are very close to each other.

There is practically no compressibility.

The particles have little attraction.

The particles are vibrating.

If the temperature of a gas in a closed container increases,

the amount of gas decreases

the average kinetic energy of molecules decreases

gas molecules collide with the walls of the container less frequently

pressure coming from the movement of the molecules increases

Which of the following assumptions of the kinetic molecular theory is able to explain why gases expand to fill up its container?

All matter consists of molecules.

The molecules move in random motion.

There are spaces in between molecules.

There is an attraction between the molecules.

Which of the following assumptions of the kinetic molecular theory is able to explain why containers filled with gases can easily be compressed?

All matter consists of molecules.

The molecules move in random motion.

There are spaces in between molecules.

There is an attraction between the molecules.

Water turns into water vapor as a sample is heated up. A while after, the sample is cooled and under a certain pressure, the vapor immediately turns into ice. Which phase changes occurred in this situation?

condensation and sublimation

evaporation and melting

evaporation and deposition

condensation and freezing

Lustrous iodine crystals when heated turn into violet vapor. What phase change is described and is this an endothermic or exothermic process?

sublimation, endothermic

sublimation, exothermic

deposition, endothermic

deposition, exothermic

A boy did an experiment to see how mothballs change phase overtime. He noticed that over time, the mothball just keeps getting smaller and smaller, without the mothball leaving any residue behind. What phase change can possibly be happening to the mothball?