Class 12 Chemistry · Chapter 17 · Test 3
Wastewater Treatment
43 MCQs
43 questions · 35 min · 43 marks
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Sample questions
The first 5 of 43. Try each one, then tap to see the answer.
Question 1
Water treatment is carried out at which levels?
- APrimary, secondary and tertiary
- BOnly primary
- COnly tertiary
- DOnly secondary
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Answer: A
The type and severity of pollution decide the methods.
Question 2
Primary treatment involves:
- AChemical purification
- BRemoval of physical debris
- CBiological processing
- DDesalination
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Answer: B
It removes large solids by screening and settling.
Question 3
Secondary treatment involves:
- ARemoval of physical debris
- BChemical purification
- CBiological processing
- DFiltering with membranes
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Answer: C
Microorganisms break down organic matter.
Question 4
Tertiary treatment involves:
- ARemoval of physical debris
- BBiological processing
- CScreening
- DChemical purification
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Answer: D
It gives the final polishing of the water.
Question 5
Screening removes:
- ALarge insoluble particles by passing water through metal screens
- BDissolved ions
- CBacteria
- DDissolved gases
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Answer: A
It is the initial stage of treatment.
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