1.

Which of the following reaction is not involved in combustion calculations?

A. CH<sub>4</sub> + 2O<sub>2</sub> CO<sub>2</sub> + 2H<sub>2</sub>O
B. 2C + O<sub>2</sub> 2CO
C. N<sub>2</sub> + O<sub>2</sub> 2NO
D. 2H<sub>2</sub> + O<sub>2</sub> 2H<sub>2</sub>O
Answer» D. 2H<sub>2</sub> + O<sub>2</sub> 2H<sub>2</sub>O


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