question_answer 1)

  Some oxidation reactions of methane are given below. Which of them is/are controlled oxidation reactions? (a) \[C{{H}_{4}}(g)+2{{O}_{2}}(g)\xrightarrow{{}}C{{O}_{2}}(g)+2{{H}_{2}}O(l)\] (b) \[C{{H}_{4}}+{{O}_{2}}(g)\xrightarrow[{}]{{}}C(s)+2{{H}_{2}}O(l)\] (c) \[C{{H}_{4}}(g)+{{O}_{2}}(g)\xrightarrow{M{{o}_{2}}{{O}_{3}}}HCHO+{{H}_{2}}O\]    (d) \[2C{{H}_{4}}(g)+{{O}_{2}}(g)\xrightarrow{Cu/523k/100atm.}2C{{H}_{3}}OH\]

Answer:

  (c, d)\[C{{H}_{4}}\] does not undergo complete combustion to give \[C{{O}_{2}}\] and \[{{H}_{2}}O\].