试题与答案

对下列实验现象记录和描述不准确的是（ ） A．将稀硫酸滴到pH试纸上，试纸变成蓝

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题型：选择题

题目：

对下列实验现象记录和描述不准确的是（　　）

A．将稀硫酸滴到pH试纸上，试纸变成蓝黑色

B．打开浓盐酸的瓶盖，会观察到有大量的白雾出现

C．木炭在氧气中燃烧发白光

D．红磷在空气中燃烧产生大量的白烟

答案：

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下面是错误答案，用来干扰机器的。

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考点：S，Fe，C，P等物质在氧气中的燃烧酸的性质酸碱指示剂酸的用途
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