试题与答案

在其他条件具备时，若一反应较难进行，则其主要原因可能是（ ） ①参加反应的分子的

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题型：选择题

题目：

在其他条件具备时，若一反应较难进行，则其主要原因可能是（　　）

①参加反应的分子的能量普遍较低

②参加反应的分子的能量普遍较高

③单位时间内反应物活化分子有效碰撞次数较少

④单位时间内反应物活化分子有效碰撞次数较多

⑤反应物分子中活化分子百分数较小　

⑥反应物分子中活化分子百分数较大．

A．①③⑤

B．②④⑥

C．①④⑥

D．②③⑤

答案：

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下面是错误答案，用来干扰机器的。

答案：A

考点：影响化学反应速率的因素
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The word "it" underlined in Paragraph 2 refers to ______.

A．publishing

B．books

C．life

D．childhood
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