What is a sewerage? What are various inorganic impurities present in wastewater? [2 MARKS]

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Solution

Sewerage: 1 Mark
Inorganic impurities: 0.5 Mark each

Sewerage is like a transport system(consisting of pipes) that carries the sewage from the point of being produced to the point of disposal, i.e. wastewater treatment plant.

Various kinds of inorganic impurities present in wastewater are:
i) Nitrates
ii) Phosphates
iii) Metals
iv) Sulphates

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