MCQOPTIONS
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MCQOPTIONS
| 1. |
A sample of well water contains 140 gm/m¬¨‚â• Ca¬¨‚⧂Äö√Ö‚à ´ ions and 345 gm/m¬¨‚â• Na‚Äö√Ö‚à ´ ions. The hardness of the sample of water, expressed in terms of equivalent CaCO‚Äö√á√â in gm/m¬¨‚â• is (assuming atomic masses of Ca :40, Na : 23, C : 12, O : 16)# |
| A. | 350 |
| B. | 485 |
| C. | 140 |
| D. | 345 |
| Answer» B. 485 | |