Quiz 2 Chapter 7 – Physical and Chemical Change (20 Questions)

Which of the following is a characteristic of a physical change?

• It alters the chemical composition
• It can be easily reversed
• It produces a new substance
• It involves a change in energy

Which of the following is an example of a chemical change?

• Melting of ice
• Dissolving salt in water
• Rusting of iron
• Breaking a glass

When wood burns in a fire, which type of change occurs?

• Physical change
• Chemical change
• Both A and B
• Neither A nor B

What happens to particles when a substance is heated?

• Particles lose mass
• Particles become larger
• Particles move faster and may change state
• Particles become less organized

What is the process in which a liquid changes into a gas?

• Sublimation
• Freezing
• Condensation
• Vaporization

Which of the following best explains why gases are compressible?

• Gas particles are tightly packed
• Gas particles have strong intermolecular forces
• Gas particles are far apart and have empty spaces
• Gas particles do not move

Which of the following is NOT a sign of a chemical change?

• Change in color
• Production of gas
• Change in state
• Formation of a precipitate

During which state change does a gas become a liquid?

• Evaporation
• Freezing
• Condensation
• Melting

What happens to the particles during the melting process?

• Particles move closer together
• Particles break free from their fixed positions
• Particles lose energy and slow down
• Particles stop moving

Which of the following is an example of a reversible physical change?

• Burning wood
• Dissolving sugar in water
• Rusting iron
• Cooking an egg