MCQOPTIONS
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| 1. |
What_is_the_flame_temperature_of_hydrogen?$ |
| A. | 2000°C |
| B. | 1200°C |
| C. | 2700°C |
| D. | 3300°C |
| Answer» B. 1200¬¨¬®‚Äö√†√ªC | |