MCQOPTIONS
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MCQOPTIONS
| 1. |
What is the chemical formula of the mineral colemanite? |
| A. | CaB<sub>6</sub>O.5H<sub>2</sub>O |
| B. | Na<sub>2</sub>B<sub>4</sub>O<sub>7</sub>.10H<sub>2</sub>O |
| C. | Ca<sub>2</sub>B<sub>6</sub>O.5H<sub>2</sub>O |
| D. | Na<sub>4</sub>O<sub>7</sub>.10H<sub>2</sub>O |
| Answer» D. Na<sub>4</sub>O<sub>7</sub>.10H<sub>2</sub>O | |