ICSE Class 6 Chemistry - Water - Test 3 (Advanced)
1. In the water cycle, clouds form mainly when water vapour:
A. Burns in the air
B. Cools and condenses
C. Changes into salt
2. Water in a wide plate dries faster than water in a narrow glass because the plate has:
A. Less air around it
B. More salt in it
C. Larger surface area
3. After rain, puddles on the road slowly disappear due to:
A. Evaporation
B. Freezing
C. Filtration
4. Drops of water appear on the outside of a cold water bottle because water vapour:
A. Melts into ice
B. Condenses on cooling
C. Turns into dust
5. Which statement about boiling water is correct?
A. It adds mud to water
B. It removes all dissolved salts
C. It kills many germs
6. A student filters muddy water. What is mainly removed by filtration?
A. Insoluble mud particles
B. Dissolved salt completely
C. The water itself
7. During filtration of muddy water, the mud left on the filter paper is called:
A. Filtrate
B. Residue
C. Solvent
8. During filtration, the clear water collected below the funnel is called:
A. Residue
B. Sediment
C. Filtrate
9. When sugar dissolves in water, the water acts as a:
A. Solvent
B. Residue
C. Sediment
10. In a sugar solution, sugar is called the:
A. Solvent
B. Solute
C. Filter
11. Sea water cannot be used directly for drinking mainly because it has:
A. No water molecules
B. Only fresh water
C. Too much dissolved salt
12. A river receives factory waste and becomes unsafe. This is an example of:
A. Water pollution
B. Water conservation
C. Condensation
13. Which action can pollute water?
A. Closing taps tightly
B. Washing clothes in rivers with detergents
C. Collecting rainwater
14. Rainwater harvesting is useful because it:
A. Wastes clean water
B. Makes water salty
C. Stores rainwater for later use
15. Which habit helps conserve water at home?
A. Turning off the tap while brushing
B. Letting water overflow from buckets
C. Ignoring leaking taps
16. If salt water is left in the sun for many days, what is left behind after water evaporates?
A. Ice
B. Salt
C. Smoke
17. Why should water from an unknown source be purified before drinking?
A. It always contains gold
B. It has no use
C. It may contain harmful germs
18. Which sequence correctly shows the water cycle in simple form?
A. Evaporation → Condensation → Rain
B. Freezing → Burning → Rusting
C. Filtration → Melting → Cutting
19. The white cloud seen near boiling water is mainly made of tiny:
A. Salt crystals
B. Water droplets
C. Sand particles
20. Why is wasting water harmful?
A. Water is needed only by machines
B. Water is unlimited everywhere
C. Clean water is limited and important