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Which of the following are the colloidal materials present in domestic sewage?

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in Biology – Class 12 by (271k points)
Which of the following are the colloidal materials present in domestic sewage?

(a) Calcium

(b) Sand

(c) Ammonia

(d) Fecal matter

I got this question during an online exam.

My question is taken from Environmental Issues in section Environmental Issues of Biology – Class 12

1 Answer

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Best answer
Correct option is (d) Fecal matter

The best explanation: The substances that do not readily dissolve in water but also are not settled down are known as colloidal substances. They may be filtered out in a Gooch Crucible and contains fecal matter, bacteria, cloth, and paper fibers.

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