State of matter

Fill in the blank of the diagram. Type your answer in the form of Solid-liquid:_______, liquid-gas:________

In which of these substances are the particles close together and moving slowly past each other?

• Ice

• Air

• Steam

• Water

A student noted the following observation in his laboratory notebook: “The particles moved slowly from an area of high concentration to an area of low concentration.” Which process is being described?

• Solid turns to liquid during melting

• A liquid being frozen

• Diffusion of a substance through air

• Boiling

A small amount of bleach was accidentally spilled on a kitchen floor. After a while it was observed that the floor appeared to be dry and the whole kitchen smelled of bleach.

Name the two processes that involved.

As the temperature of air in a balloon ............1.............. the volume increases. When the volume of air in a balloon increases the pressure ...............2...................

The diagram shows a cup of hot chocolate which was prepared by mixing boiling water with chocolate powder. Which answers correctly describes the particles in the air above the cup compared to particles of water in the hot chocolate drink inside the cup?

• Particles move faster, particles are closer together

• Particles move faster, particles are far apart from each other

• Particles move slower, particles are closer together

• Particles move slower, Particles are far apart from each other

Name the two processes that involved.

Hydrogen chloride and ammonia are gases which are given o by cotton wool soaked in concentrated solutions and placed at either end of a glass tube as shown. When the gases react together they produce ammonium chloride, a white solid. Which line on the diagram correctly shows where the ammonium chloride is formed? [Ar: H=1, Cl=35.5, N=14]

• Line A

• Line B

• Line C

• Line D

The kinetic theory of matter explores the spatial relationship between the particles in solids, liquids and gases. Which of the following processes causes the distance between particles to increase by the most?

• Melting

• Freezing

• Vaporizing

• Condensation

A student closed the lid tightly on an empty metal container which was used for paint. She heated the container over a Bunsen burner on a low ame for a few moments and observed the sides and top of the container bend outwards slightly. She then turned o the burner and allowed the container to cool. Which statement explains her observations?

• The heat made the container reduce in size

• More air particles entered the container

• The heat increases the volume of the container

• The air particles move out from the container