Is matter around us pure? easy

Is Matter Pure Around Us? Quiz (Easy)

1. Which of the following is not a physical change?

a) Melting of ice b) Burning of paper c) Dissolving sugar in water d) Boiling of water

2. A mixture of two or more substances in any proportion is called:

a) Compound b) Element c) Solution d) Mixture

3. Which method is used to separate cream from milk?

a) Filtration b) Decantation c) Centrifugation d) Distillation

4. The process of converting a liquid into a gas is called:

a) Evaporation b) Condensation c) Sublimation d) Fusion

5. Which of the following is a homogeneous mixture?

a) Sand and water b) Oil and water c) Salt and sugar d) Air

6. The process of separating heavier and lighter components of a mixture by using a centrifuge is called:

a) Filtration b) Decantation c) Sublimation d) Centrifugation

7. Which method is used to separate a mixture of two miscible liquids with different boiling points?

a) Filtration b) Decantation c) Sublimation d) Distillation

8. Which of the following is a chemical change?

a) Boiling of water b) Rusting of iron c) Dissolving salt in water d) Melting of ice

9. Which method is used to separate an insoluble solid from a liquid?

a) Filtration b) Decantation c) Centrifugation d) Distillation

10. What is the boiling point of pure water at standard atmospheric pressure?

a) 0°C b) 100°C c) 373°C d) 1000°C