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Class 7 Science Chapter 13 Wastewater Story Quiz 2 (25 MCQs)

Quiz Instructions

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1. Which plant is suggested for purification of sewage pond water?
2. Human excreta and urea are removed by
3. NETWORK OF BIG AND SMALL PIPES IS CALLED
4. What is the purpose of using ultraviolet light on the water?
5. What is the effect of excessive organic compounds in water?
6. Select those which are organic substances present in waste water.
7. Cellular Respiration takes place in
8. Which one of the following is a quality of wastewater?
9. Assertion A:Soft toys, used tea leaves, paints and oils should not be thrown in the drain.Reason R:These waste choke the drain and do not allow free flow of oxygen thus hampering the degradation process.
10. We can disinfect water with chemicals like ..... and .....
11. Sewage is mainly a
12. Human feces can be used to produce biogas fuel.
13. Which plant have vegetative propagation of aerial stem?
14. Which type of pollination is self-pollination is?
15. Which of the following is waste water?
16. ..... ARE USED TO CLEAN WATER
17. An open-drain system is a breeding place for which of the following.
18. Which of the following chemical is used to disinfect water
19. Large objects and garbage in the wastewater are removed by passing them through the .....
20. The skimmer removes oil and grease
21. Earthworms skin is
22. Examples of inorganic impurities
23. This is referred to as the energy currency of the cell
24. The ..... produced is used as a source of energy.
25. In the cells Oxygen is used to break down
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