The coagulant used in raw water to precipitate suspended impurities is:
Correct answer: C. Alum
- A. Caustic soda
- B. Lime water
- C. Alum
- D. Soda ash
Explanation
A is incorrect as caustic soda is not used as a coagulant.B is incorrect as lime water is not used as a coagulant,but is used to detect the presence of CO2 gas.C is correct as alum is used as a coagulant in raw water to remove suspended impurities.D is incorrect as soda ash is not used as a coagulant
This question appeared on the UHS MDCAT 2010 paper, which you can sit online with every answer explained.
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