ICSE Class 6 Chemistry - Air and Atmosphere - Test 2 (Intermediate)
1. A soft football becomes hard after pumping air into it. This shows that air:
A. Has colour
B. Has no matter
C. Occupies space
2. A balloon filled with air weighs more than an empty balloon because air has:
A. Mass
B. No weight
C. No volume
3. Why is air called a mixture?
A. It contains only oxygen
B. It contains different gases
C. It is made of only one compound
4. Which gas in air does not support burning and is present in the largest amount?
A. Oxygen
B. Carbon dioxide
C. Nitrogen
5. A glowing splinter burns brighter in a gas. The gas is most likely:
A. Oxygen
B. Nitrogen
C. Water vapour
6. A gas turns lime water milky. Which gas is likely present?
A. Oxygen
B. Carbon dioxide
C. Nitrogen
7. Water droplets appear outside a cold bottle because air contains:
A. Smoke only
B. Nitrogen only
C. Water vapour
8. Which statement about the atmosphere is correct?
A. It helps support life on Earth
B. It is made only of dust
C. It is found only inside houses
9. When leaves move because of moving air, the moving air is called:
A. Fog
B. Wind
C. Dust
10. During food-making, green plants take in:
A. Smoke
B. Helium
C. Carbon dioxide
11. Which gas is released by green plants during photosynthesis?
A. Oxygen
B. Smoke
C. Dust
12. A candle flame becomes weak when covered partly. This is because:
A. Nitrogen starts burning
B. Less oxygen reaches the flame
C. Carbon dioxide changes into wax
13. Why can carbon dioxide help extinguish fire?
A. It burns very fast
B. It changes fire into ice
C. It does not support burning
14. A table becomes dusty after a few days because air may contain:
A. Dust particles
B. Gold particles
C. Large stones
15. Smoke from factories mainly causes:
A. Clean air
B. Air pollution
C. More fresh oxygen only
16. Why should we avoid breathing polluted air?
A. It always smells like flowers
B. It contains only oxygen
C. It may harm our health
17. Which action can help reduce air pollution?
A. Using public transport
B. Burning garbage openly
C. Cutting all trees
18. When air is pumped into a tyre, air is pushed inside because air can exert:
A. Colour
B. Pressure
C. Sweet taste
19. A parachute slows down a falling person because air:
A. Is a solid wall
B. Has no effect
C. Offers resistance
20. Which observation shows that air is present around us?
A. We feel wind on our face
B. We see empty space as metal
C. We hear shadows moving