Class 10 Chemistry MCQs – Practice Test 2 (Chapter 7)

Environmental Chemistry II Water MCQ with Answers PDF Download – Test 2

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Environmental Chemistry II Water MCQ – Practice Test 2 PDF Download

MCQ 6: What percentage of fresh water is available to man?

0.2
0.02
0.002
0.0002

MCQ 7: What is the second step of raw water treatment?

sedimentation
coagulation
filtration
chlorination

MCQ 8: What is the percentage of water from rivers and lakes?

0
0.002
0.006
0.021

MCQ 9: Permanent hardness of water is caused due to the presence of dissolved:

calcium hydrogen carbonates
magnesium hydrogen carbonates
chlorides of magnesium
Sulphates of magnesium

MCQ 10: Step of sewage water treatment in which there are some aeration and organic material is converted to inorganic materials is called:

primary sewage treatment
secondary sewage treatment
activated sludge treatment
chlorination

Class 10 Chemistry Notes App & e-Book – Environmental Chemistry II Water Exam Prep

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