MCQOPTIONS
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| 1. |
Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at __________ C in absence of air. |
| A. | 50-80 |
| B. | 250-400 |
| C. | 1000-1200 |
| D. | 800-900 |
| Answer» C. 1000-1200 | |