MCQOPTIONS
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| 1. |
The temporary hardness of water, is caused by: |
| A. | dissolved carbondioxide |
| B. | bicarbonates and carbonates of calcium and magnesium |
| C. | bicarbonates of sodium and potassium |
| D. | carbonates of calucium and magnesium |
| Answer» C. bicarbonates of sodium and potassium | |