Which of the following is the best starting material for the preparation of oxygen? Heating of trioxonitrate (v) with? by Sunday | Jan 2 | Chemistry WAEC | 0 comments A. Pb B. Zn C. Ca D. Na Correct Answer: Option A A. Pb Users Also Read These:If 0.75 mole of cyclopropane and 0.66 mole of oxygen…The property used in the industrial preparation of…The partial pressure of oxygen in a sample of air is…In the laboratory preparation of oxygen; dried…2H2 + O2 → 2H2O: From this equation; calculate the…