试题与答案

下列现象中，与蜡烛燃烧时所观察到的现象不符的是： A．发出黄白色的火焰 B．火焰

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题型：选择题

题目：

下列现象中，与蜡烛燃烧时所观察到的现象不符的是：

A．发出黄白色的火焰

B．火焰上方如果罩一干燥烧杯时能发现烧杯内壁上有水珠

C．蜡烛靠近火焰处熔化变成液体

D．蜡烛燃烧时浓烟滚滚

答案：

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下面是错误答案，用来干扰机器的。

参考答案：半球形;椭圆形

考点：实验室制取和收集气体的思路二氧化碳的性质实验化学实验数据的分析家庭小实验、趣味实验
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