• # question_answer 49)   Which of the following reactions of methane is incomplete combustion? (a) $2C{{H}_{4}}+{{O}_{2}}\xrightarrow{Cu/523K/100atm.}2C{{H}_{3}}OH$        (b) $C{{H}_{4}}+{{O}_{2}}\xrightarrow{M{{o}_{2}}{{O}_{3}}}HCHO+{{H}_{2}}O$ (c) $C{{H}_{4}}+{{O}_{2}}\xrightarrow{{}}C(s)+2{{H}_{2}}O(l)$                  (d) $C{{H}_{4}}+2{{O}_{2}}\xrightarrow[{}]{{}}C{{O}_{2}}(g)+2{{H}_{2}}O(l)$

(c) Complete combustion of $C{{H}_{4}}$ gives $C{{O}_{2}}$ and${{H}_{2}}O$.