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Question
Some oxidation reactions of methane are given below. Which of them is/are controlled oxidation reactions?
(i) \[\ce{CH4 (g) + 2O2 (g) -> CO2 (g) + 2H2O (l)}\]
(ii) \[\ce{CH4 (g) + O2 (g) -> C (s) + 2H2O (l)}\]
(iii) \[\ce{CH4 (g) + O2 (g) ->[Mo2O3] HCHO + H2O}\]
(iv) \[\ce{2CH4 (g) + O2 (g) ->[Cu/523 /100 atm] 2CH3OH}\]
Solution
(iii) \[\ce{CH4 (g) + O2 (g) ->[Mo2O3] HCHO + H2O}\]
(iv) \[\ce{2CH4 (g) + O2 (g) ->[Cu/523 /100 atm] 2CH3OH}\]
Explanation:
Reactions in which methane does not undergo complete combustion to give carbon dioxide and water or incomplete combustion to give carbon and water are controlled oxidation reactions.
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