MCQOPTIONS
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| 1. |
Natural muscovite is normally stable up to _____? |
| A. | 300<sup>o</sup>C |
| B. | 600<sup>o</sup>C |
| C. | 800<sup>o</sup>C |
| D. | 1000<sup>o</sup>C |
| Answer» C. 800<sup>o</sup>C | |