Q1. Which of these proves that air is matter?
a) It has no colour
b) It occupies space
c) It has mass
d) Both (b) and (c)
Q2. In which state of matter are particles tightly packed with very little space?
a) Solid
b) Liquid
c) Gas
d) Plasma
Q3. Which of these is a compound?
a) Gold
b) Oxygen
c) Carbon dioxide
d) Sulphur
Q4. Which of these has no fixed shape or volume?
a) Solid
b) Liquid
c) Gas
d) All of these
Q5. Which of these is not an element?
a) Iron
b) Sodium
c) Water
d) Sulphur
Q6. Define matter with examples.
Q7. Why can gases be compressed easily but not solids?
Q8. State two differences between solids and liquids.
Q9. What is an element? Give two examples.
Q10. What is the difference between an atom and a molecule?
Q11. Explain the properties of solids, liquids, and gases with suitable examples.
Q12. Describe the particle theory of matter.
Q13. Differentiate between elements and compounds with examples.