【題目】在貝殼上滴稀鹽酸，能產(chǎn)生使澄清石灰水渾濁的氣體， 這說(shuō)明貝殼中含有的離子是( )。

A．Ca2＋ B．CO32- C．SO42- D．OH－

【答案】B

【解析】

試題分析：使澄清石灰水渾濁的氣體是二氧化碳。而能與鹽酸產(chǎn)生二氧化碳?xì)怏w的是碳酸鹽。所以可說(shuō)明貝殼中含有碳酸根離子。

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