Class 10 Chemistry MCQs – Practice Test 6 (Chapter 7)

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Environmental Chemistry II Water MCQ – Practice Test 6 PDF Download

MCQ 26: What happens to water on cooling?

it expands up to 4 °C
it contracts up to 4 °C
it expands up to 2 °C
it contracts up to 2 °C

MCQ 27: Out of total the amount of water available for human use is:

0.003
0.002
0.4
0.5

MCQ 28: What is the percentage of atmospheric water?

0
0.002
0.006
0.021

MCQ 29: Step of sewage water treatment in which some of the solids are removed as sludge is called:

primary sewage treatment
secondary sewage treatment
activated sludge treatment
chlorination

MCQ 30: The second step of sewage water treatment is called:

primary sewage treatment
secondary sewage treatment
activated sludge treatment
chlorination

Environmental Chemistry II Water MCQ App & e-Book – Class 10 Chemistry Entrance Exam

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