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    【题目】下表记录了物质X的溶液分别加入到另外三种物质的溶液中产生的现象。则物质X的化学式可能是( )。

    物质

    氢氧化钠

    碳酸钠

    石蕊

    现象

    无明显现象

    产生气泡

    溶液变红

    A.Ca(OH)2 B．CuSO4 C．HCl D．KCl

    【答案】C

    【解析】

    试题分析：用代入法可知X为盐酸。

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