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One French unit is equal to __________ ppm.(a) 10(b) 20(c) 30(d) 40I got this question in final exam.My question is based upon Problems, Units and Formulae topic in chapter Water of Applied Chemistry

Answer»

The correct ANSWER is (a) 10

Explanation: One French unit is equal to the 10ppm. Hardness CAUSING salt as the number of PARTS of the substance by weight in million parts by weight of WATER is ppm.



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