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ASMO Science Olympiad 2015 — Level 2 (Years 5 & 6) Question 2

ASMO Science · ASMO Science Olympiad 2015 — Level 2 (Years 5 & 6)

Question 2

Chlorine is added into water for public water supplies. What is the purpose of the addition of chlorine?

Question illustration
  1. To kill germs.
  2. To add in nicer taste into water.
  3. To colourise water.
  4. To prevent tooth decay.