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

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Environmental Chemistry II Water Quiz – Practice Test 7 PDF Download

MCQ 31: Process in which water is filtered through sand and gravel is called:

sedimentation
coagulation
filtration
chlorination

MCQ 32: How many basic steps are involved in raw water treatment?

three
four
five
six

MCQ 33: Natural water is:

pure
impure
non distilled
distilled

MCQ 34: Addition of washing soda removes:

softness of water
temporary hardness of water
permanent hardness of water
hydrogen from water

MCQ 35: The first step of sewage water treatment is called:

primary sewage treatment
secondary sewage treatment
activated sludge treatment
chlorination

Environmental Chemistry II Water Quiz App & e-Book – Class 10 Chemistry Study Material

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Environmental Chemistry II Water MCQs

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