Grade 6 Chemistry

People must have _______ to drink in order to survive.

• frozen water
• clean water
• contaminated water
• polluted water

What is the best way to purify water?

• Add salt

• Put inside the refrigerator

• Filtration or Boiling

• Find a very clean stream of water

What does chlorination do to the water?

• kills microorganisms

• Cleans the water

• Makes the water taste nice

• Removes twigs and sediment

Used to separate suspended particles from a liquid

• Filtration

• Distillation

• Crystallisation

• Evaporation

Used to separate a dissolved solid from its solution

• Filtration

• Evaporation

• Crystallisation

• Sublimation

what is added during coagulation process in water treatment plant

• alum and slaked lime

• florida

• chlorine

• calcium carbonate

Can sand pass through filter paper?

• Yes

• No

During the purification process, filtration separates the

• Solid purities

• Solid impurities

Th components of filtration are separated based on

• boiling point

• solubility

• particle size

Is water purified by Solar Purification good to health.

• Yes

• No