[题目]空气中含量最多的气体是 ,澄清石灰水露置在空气中会逐渐变浑浊.这说明空气中有少量的 ,盛有冰水的杯子.放在常温的空气中.外壁会潮湿.说明空气中有 ,将一只老鼠放入一个密封的玻璃瓶内.过一段时间.老鼠才会死亡.说明空气中有 . 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】空气中含量最多的气体是________；澄清石灰水露置在空气中会逐渐变浑浊，这说明空气中有少量的________；盛有冰水的杯子，放在常温的空气中，外壁会潮湿，说明空气中有________；将一只老鼠放入一个密封的玻璃瓶内，过一段时间，老鼠才会死亡，说明空气中有________。

【答案】氮气(或N2) 二氧化碳(或CO2) 水蒸气(或H2O) 氧气(或O2)

【解析】

试题分析：空气中含量最多的气体是氮气(或N2)；二氧化碳(或CO2)能使澄清石灰水变浑浊；盛有冰水的杯子，放在常温的空气中，外壁会潮湿，是因为空气的水蒸气(或H2O)遇冷冷凝面成；将一只老鼠放入一个密封的玻璃瓶内，过一段时间，老鼠才会死亡，说明空气中有一定量的氧气(或O2)。

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