ICSE Class 6 Chemistry - Water - Test 5 (Comprehensive)
1. Which statement best explains why water is necessary for our body?
A. It changes bones into metal
B. It stops all body functions
C. It helps in important body processes
2. Water stored as ice in very cold regions is found mainly in:
A. Glaciers
B. Desert sand
C. Factory smoke
3. Most of the water on Earth is present as:
A. Fresh river water
B. Salty sea water
C. Drinking water only
4. Which set correctly shows the three states of water?
A. Sand, salt, sugar
B. Smoke, dust, soil
C. Ice, water, water vapour
5. The change of liquid water into ice is called:
A. Freezing
B. Evaporation
C. Condensation
6. Which change happens when ice cream melts on a hot day?
A. Liquid changes into gas
B. Solid changes into liquid
C. Gas changes into solid directly
7. Water kept in sunlight evaporates faster mainly because of:
A. Less heat
B. More mud
C. Higher temperature
8. Which process changes water vapour into liquid water?
A. Condensation
B. Melting
C. Cutting
9. In the water cycle, water collecting in rivers and lakes after rain is called:
A. Burning
B. Collection
C. Rusting
10. Water present below the ground is called:
A. Cloud water only
B. Smoke water
C. Groundwater
11. Which pair of methods can first settle mud and then pour off clearer water?
A. Sedimentation and decantation
B. Melting and freezing
C. Burning and rusting
12. Alum is sometimes added to muddy water to help:
A. Make water salty
B. Settle fine impurities
C. Freeze water immediately
13. Which statement is correct about boiling dirty water?
A. It always removes all mud particles
B. It turns mud into sugar
C. It can kill many germs
14. A household water filter is mainly used to:
A. Remove impurities from water
B. Add garbage to water
C. Make water burn
15. Which process gives very pure water by first making vapour and then cooling it?
A. Handpicking
B. Distillation
C. Sieving
16. What can happen if harmful chemicals enter a river?
A. The river becomes safer to drink directly
B. All germs disappear forever
C. The water becomes polluted
17. Which is the best example of water conservation?
A. Using only the needed amount of water
B. Letting water overflow from tanks
C. Keeping taps open while not in use
18. The main purpose of rainwater harvesting is to:
A. Waste rainwater
B. Store rainwater
C. Pollute rainwater
19. Which comparison is correct?
A. Flood means no rain; drought means too much water
B. Flood and drought both mean clean drinking water only
C. Flood means too much water; drought means too little rain
20. Which statement best explains why we should protect water resources?
A. Usable fresh water is limited and essential
B. Water is not needed by living things
C. Polluted water is always safe to drink