Unit11: Water

1. Which of the following is not a property of water?

• 1. Universal solvent

• 1. High surface tension

• 1. Only water can evaporate

• All of these

1. Nearly 70% of —--------------------- is frozen

• 1. Salt water

• 1. Fresh water

• 1. Sea water

• None of these

1. Solid water becomes liquid by  

• 1. Freezing

• 1. Evaporating

• 1. Melting

• Cooling

1. Which of the following affects evaporation?

• 1. Surface area

• 1. Solidity

• 1. Acidification

• Color

1. Change of water into its vapour at any temperature below its 100⁰C

• 1. Freezing

• 1. Melting

• 1. Evaporation

• Cooling

1. Which property of water allows it to form droplets?

• 1. High boiling point

• 1. High surface tension

• 1. Low freezing point

• 1. High evaporation rate

1. How is water purified through boiling?

• 1. By adding chemicals

• 1. By filtering

• 1. By heating it to a high temperature

• 1. By exposing it to sunlight

1. What causes acidification of surface water?

• 1. Use of fertilizers and pesticides

• 1. Sewage discharge

• 1. Air pollution

• 1. Improper disposal of waste

1. How does water enter a landfill?

2. A) Through precipitation

3. B) Through groundwater

4. C) Through the disposal of liquids

• A) and B)

• A) only

• A), B and C)

• C) only

1. Which of the following is NOT an activity that affects water quality?

• 1. Use of fertilizers and pesticides

• 1. Sewage discharge

• 1. Proper disposal of waste

• 1. Landfill