Page 1 - REMOVING IMPURITIES FROM WATER AND PURIFYING IT
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CHAPTER 13 – AIR AND WATER
TOPIC- REMOVING IMPURITIES FROM WATER AND PURIFYING IT
OBJECTIVE QUESTIONS
Q.1 Fill in the blanks:
a) Filtration is generally used to remove light __________impurities from
water.
b) Sedimentation and decantation can be used to remove ___________
impurities from water.
c) Chlorine is added to the water to kill___________.
d) Chemicals such as __________ are also added to purify water.
e) Water in purification plants is filtered by passing through filters made
of____________.
Q.2. Write one word for the following:
a) 1 water purifying method by which you can separate insoluble impurities.
b) 1 water purifying method which kills germs.
c) A substance that kills germs when added to water.
Q.3. Match the following:
A B
a. Filtration i) heating
b. Sedimentation ii) adding chlorine tablets
c. Decantation iii) mud and dirt settles down on leaving undisturbed
d. Boiling iv) removal of undesired liquid on pouring
e. Chlorination v) filtering using a filter paper
