MCQOPTIONS
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MCQOPTIONS
| 1. |
Concentration of fluorine that cause a phototoxicological effect on the plant is ___________ |
| A. | 0.1 g/m<sup>3</sup> |
| B. | 0.3 g/m<sup>3</sup> |
| C. | 0.5 g/m<sup>3</sup> |
| D. | 1 g/m<sup>3</sup> |
| Answer» C. 0.5 g/m<sup>3</sup> | |