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The very hard water has the hardness of CaCO3 is given by ___________(a) 100-200ppm(b) 100-300ppm(c) 200-300ppm(d) Above 300ppmThis question was posed to me during an interview.This intriguing question originated from Estimation of Hardness in portion Water of Applied Chemistry |
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Answer» CORRECT answer is (c) 200-300ppm To explain I would say: The very hard WATER has the hardness of CaCO3 is GIVEN about above 300ppm. The hard water is having the hardness of CaCO3 is given by 150-300ppm. |
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