ICSE Class 6 Chemistry - Water - Test 4 (Expert)
1. Wet clothes dry faster under a fan because moving air:
A. Freezes the water
B. Helps evaporation happen faster
C. Changes water into salt
2. Two bowls of water are kept in sunlight. One is covered and one is open. Which bowl will lose water faster?
A. Covered bowl
B. Both will never lose water
C. Open bowl
3. Dew drops seen on grass in the morning are formed due to:
A. Condensation
B. Burning
C. Rusting
4. In the water cycle, what happens after water vapour rises high into cooler air?
A. It changes into sand
B. It condenses to form clouds
C. It disappears forever
5. Rain falling from clouds is an example of:
A. Filtration
B. Freezing only
C. Precipitation
6. When rainwater slowly enters the soil, it helps form:
A. Groundwater
B. Plastic
C. Smoke
7. A well mainly gives us water from:
A. Clouds directly
B. Underground sources
C. Fire pits
8. Dirty water is kept still in a bucket. After some time, heavy dirt settles at the bottom. This process is:
A. Melting
B. Condensation
C. Sedimentation
9. After mud settles at the bottom, the clear water above is carefully poured out. This is called:
A. Decantation
B. Freezing
C. Dissolving
10. In many water treatment methods, chlorine is added to water mainly to:
A. Make water muddy
B. Kill germs
C. Add sand particles
11. Which method can be used to get pure water from salt water in a laboratory?
A. Handpicking
B. Sieving
C. Distillation
12. During distillation, the water vapour is cooled to get:
A. Liquid water
B. Dry sand
C. Smoke
13. When heavy rain causes land to be covered with too much water, it is called a:
A. Drought
B. Flood
C. Desert storm only
14. A long period without enough rainfall can lead to:
A. More drinking water everywhere
B. More ice in all rivers
C. Drought
15. Oil spilled into a pond is harmful because it can:
A. Pollute the water and harm aquatic life
B. Make water safer to drink
C. Turn all water into ice
16. Which is a better way to save water while washing a bicycle?
A. Keeping the hose running continuously
B. Using a bucket of water
C. Washing it in a river
17. Drip irrigation helps farmers because it:
A. Wastes more water
B. Adds plastic to crops
C. Uses water more carefully
18. A salty solution tastes very strong. If more water is added, the solution becomes:
A. More dilute
B. More salty always
C. A solid block
19. If no more sugar dissolves in a glass of water, the solution is:
A. Empty
B. Saturated
C. Pure ice
20. Which description best matches drinking water?
A. Water mixed with sewage
B. Water full of mud and germs
C. Water that is clean and safe to drink