1. Civil Engineering
  2. Environmental Engineering
  3. The hardness of soft water (in ppm) is
Q.

The hardness of soft water (in ppm) is

A. 0 - 50
B. 50 - 150
C. 200 - 350
D. 375 - 500
E. 500 - 1000
Answer» A. 0 - 50
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