Science Ch- Waste water Story Test

Class 7 Waste water Story 

Test            Total marks - 10


Q 1 Wastewater is fit for human consumption or not. Give reason to support your answer.

Q2 Name two chemicals used to disinfect wastewater.

Q 3 Special type of toilets has been designed in aeroplanes, name it.

Q 4 Name the toilets used in areas with limited water supply.

Q5 Name the type of toilets which are most suitable for holding an outdoor music festival in a park.

Q6 Name two things that can be made from sludge extracted during treatment of sewage.

Q 7 The Eucalyptus trees are planted along sewage ponds. Give reason. [HOTS]

Q 8 Name two inorganic impurities present in sewage. [NCERT Exemplar].

Q 9 Give some examples of onsite sewage disposal systems.

Q 10 World Water Day is celebrated on___________.

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