186. 下列各反應中,何者在室溫下之反應速率最慢?
(A)CH4(g)+2O2(g)→CO2(g)+2H2O(g)
(B)Fe2 +(aq )+Ce4 +(aq )→Fe3 +(aq)+Ce3 +(aq)
(C)5Fe2+(aq )+MnO4-+8H+ →5Fe3 +(aq )+Mn2 ++4H2O(1)
(D)2NO(g )+O2(g )2NO2(g )

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