0.1% of the composition of wastewater is contributed by three different types of materials. Choose the set of substances from the following which depicts all the three types of impurities found in was

Question

0.1% of the composition of wastewater is contributed by three different types of materials. Choose the set of substances from the following which depicts all the three types of impurities found in wastewater.

TestHub · Accepted Answer

Wastewater comprises of 99% water and 0.1% of impurities. These impurities are of three types:
1. Suspended solids, e.g., sand, silt and clay.
2. Colloidal material, e.g., Faecal matter, bacteria, cloth and paper fibres.
3. Dissolved materials, e.g., nutrients (nitrate, ammonia, phosphate, calcium, sodium).

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