MCQOPTIONS
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MCQOPTIONS
| 1. |
What is the chemical formula of the mineral colemanite? |
| A. | CaB6O.5H2O |
| B. | Na2B4O7.10H2O |
| C. | Ca2B6O.5H2O |
| D. | Na4O7.10H2O |
| Answer» D. Na4O7.10H2O | |