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Physical and Chemical Changes Quiz

Class VII
Science
Physical and Chemical Changes
13 questions
HARD

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

New substances are formed · Energy is absorbed or released · The change is usually reversible · Chemical bonds are broken

2. What happens during a chemical change?

The physical state changes · The composition of the substance changes · The size of the substance changes · The color of the substance changes

3. Which of the following is an example of a physical change?

Burning of wood · Rusting of iron · Melting of ice · Digestion of food

4. Which of the following indicates a chemical change?

Dissolving sugar in water · Boiling of water · Formation of a gas · Crushing a can

5. In which process does a solid change directly to gas?

Sublimation · Condensation · Evaporation · Freezing