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NCERT Solutions for Class 7 Science Chapter 13 Wastewater Story



Q 1. Biodegradable waste are generally?
Ans. Organic.
Q 2. Cholera is a?
Ans. Water borne disease.
Q 3. In which year Government of India has initiated new misson Swachh Bharat?
Ans. 2016.
Q 4. Full form of WWTP?
Ans. Wastewater Treatment Plant.

Q 5. Micro- organisms which causes cholera?
Ans. Bacteria.
Q 6. Waste matter discharged from human body is called?
Ans. Excreta.
Q 7. A word related to hygiene?
Ans. Sanitation.
Q 8. Solid waste extracted in sewage treatment?
Ans. Sludge.
Q 9. Liquid water waste are called?
Ans. Sewage.
Q 10. Drains get blocked by?
Ans. Chemical and Kitchen waste.
Q 11. Dried sludge is used as?
Ans. Manure.
Q 12. Wastewater released by houses is called?
Ans. Sewage.

Q 13. Cleaning of water is a process of removing?
Ans. Pollutants.
Q 14. Name the diseases which are caused by polluted water?
Ans. 1.Typhoid
2.Dysentery
3.Cholera.
Q 15. Name the chemical that is used to disinfect water?
Ans. 1.Chlorine
2.Bleaching powder
3.Ozone.
Q 16. Which decade was proclaimed as the International decade for action on " Water for life" by the general assembly of the United nations?
Ans. 2005-2015.