C1 EMH - States of Matter

Which of the following statements is correct about gases?

• A specific mass of a gas has a fixed volume at room temperature

• A specific mass of a liquid has a fixed volume at room temperature

• 25 cm3 of gas contains more particles than 25 cm3 of liquid

• Liquid particles placed inside a sealed container have fixed positions

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

• Ice

• Steam

• Air

• Water

What process is described by particles moving from an area of high concentration to an area of low concentration?

• Diffusion of substance in a liquid

• Diffusion of a substance through air

• The particles of a solid during melting

• A liquid being frozen

What processes occurred when bleach spilled on the floor and the kitchen smelled of bleach?

• Evaporation and diffusion

• Distillation and diffusion

• Evaporation only

• Diffusion only

As the temperature of air in a balloon increases, what happens to the volume?

• The volume remains the same

• The volume decreases

• The volume increases

• The volume fluctuates

Which statements describe the arrangement of particles in a solid?

• Particles are moving in all directions

• Particles are arranged in neat rows

• Particles can move past each other

• Particles vibrate about their positions

Which row correctly describes the particles of water in the air above a cup compared to those in hot chocolate?

• Particles move faster, particles are closer together

• Particles move slower, particles are further apart

• Particles move faster, particles are further apart

• Particles move slower, particles are closer together

What occurs when a blue soluble crystal is placed in a beaker of water?

• Chemical process

• Dissolving

• Diffusion

• Evaporation

In which state do particles vibrate around fixed positions but don't move?

• Gas

• Plasma

• Liquid

• Solid

In which changes do the particles move closer together?

• Gas to liquid

• Liquid to solid

• Gas to solid

• All of the above