MCQOPTIONS
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MCQOPTIONS
| 1. |
What are the chemical elements present in wood? |
| A. | tC, O, H, N |
| B. | tCo<sub>2</sub>, O<sub>2</sub>, N<sub>2</sub>, H<sub>2</sub> |
| C. | tCo<sub>2</sub>, O<sub>2</sub>, N<sub>2</sub>, H |
| D. | tCo<sub>2</sub>, O<sub>2</sub>, N, H<sub>2</sub> |
| Answer» B. tCo<sub>2</sub>, O<sub>2</sub>, N<sub>2</sub>, H<sub>2</sub> | |