Gujarat BoardEnglish MediumSTD 7ScienceWastewater Story1 Mark
MCQ
Drains get blocked by:
A
Oil and tea leaves.
✓
Oil and chemicals.
C
Chemicals and soil.
D
Chemicals and water.
✓
Answer
Correct option: B.
Oil and chemicals.
Cooking oil and fats should not be thrown down the drain.
They can harden and block the pipes.
In an open drain, the fats clog the soil pores reducing its effectiveness in filtering water.
Throw oil and fats in the dustbin. Chemicals like paints, solvents, insecticides, motor oil, medicines may kill microbes that help purify water.
So do not throw them down the drain.
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