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B
4
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C
6
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D
7
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Solution
The correct option is A 5 The wastewater from houses and apartments, mostly coming from the kitchen, bathroom, and laundry sources, is called the domestic sewage. It includes wastes from the dishwashing, the garbage disposal, and baths and showers.
The domestic sewage includes:
Solid wastes - These include plastic, paper, kitchen waste (vegetable peels), cloth and cardboards dumped into the water bodies.
Liquid wastes - They are the wastes in liquid form flowing straight to the water bodies. They include oils, soapy water and certain cleaning chemicals etc.