2018年中考化学真题分类汇编2我们身边的物质考点9氧气1性质和用途实验现象(无答案).doc

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1氧气(18 本溪)11下列有关实验现象的描述正确的是A木炭在氧气中燃烧生成二氧化碳B硫在氧气中燃烧发出淡蓝色火焰C红磷在空气中燃烧生成白色烟雾D镁条在空气中燃烧生成白色固体(18 天津)7下列说法正确的是( )A木炭燃烧后生成黑色固体 B铁丝伸入盛有氧气的集气瓶中剧烈燃烧C红磷在空气中燃烧产生白色烟雾 D硫在氧气中燃烧发出监紫色火焰(18 邵阳)3下列有关实验现象描述正确的是A硫在氧气中燃烧产生淡蓝色的火焰B红磷在空气中燃烧产生大量的白烟C碳在空气中燃烧生成二氧化碳D将铁丝伸入盛有氧气的集气瓶中剧烈燃烧(18 岳阳)6下列有关实验现象的描述,正确的是( )A红磷在空气中燃烧产生大量白雾2B木炭在空气中燃烧生成二氧化碳C硫在空气中燃烧发出蓝紫色火焰D铁丝在氧气中燃烧生成黑色固体

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