本题目来源于试卷: How Much How Fast & How Far E.2 Rate of Chemical Change，类别为 IB化学
[单选题]
What set of descriptions is correct about the following energy level diagram?
A. $X$, $Z$ are transition states, $Y$ is an intermediate, a catalyst could lower position of $X$
B. $Y$is a transition state,$ X$, $Z$ are intermediates, a catalyst could lower position of $Y$
C. $X$, $Z$ are transition states, $Y$ is an intermediate, a catalyst could lower position of $Y$
D. $Y$ is a transition state, $X$, $Z$ are intermediates, a catalyst could reduce $W$
参考答案: A
本题详细解析:
A The peaks represent transition states where energy is at its highest. This graph shows a multi-step mechanism where Y is an intermediate species between R and P. Catalysts lower the activation energy which is the difference between R and X.
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