Bioremediation — Practice Quiz
CBSE · Class 12 · Biotechnology
Try a 4-question quiz on Bioremediation for CBSE Class 12 Biotechnology: tap an answer to check it and see why. 61 questions in the full chapter test.
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What does the term bioremediation mean in the chapter context?
What is the approximate composition of municipal sewage?
Which value is used for BOD measurement incubation?
Which stage of sewage treatment is physical or mechanical?
Sample Questions
What is the usual BOD removal achieved by primary treatment?
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30 to 40 percent
Primary treatment achieves about 30 to 40 percent BOD removal.
Which is the correct role of activated sludge in sewage treatment?
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It is sludge settling at the bottom of the second settling tank with a high density of bacteria
Activated sludge is the sludge that settles at the bottom of the second settling tank and is rich in conditioned bacteria.
Which gas is the major product of anaerobic sludge digestion?
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Methane
Anaerobic sludge digestion produces methane as the major gas, along with carbon dioxide and small amounts of other gases.
Which waste is treated as a good example of fertiliser after sludge processing?
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Milorganite
Milorganite is cited as an example of a fertiliser produced from processed anaerobic sludge digest by-product.
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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