试题与答案

铁是地壳中含量很丰富的元素,金属铁是在高炉中冶炼的,在冶金工业中,常用焦炭来冶炼

题型:填空题

题目:

铁是地壳中含量很丰富的元素,金属铁是在高炉中冶炼的,在冶金工业中,常用焦炭来冶炼铁。

(1)写出焦炭在高炉中所参与的两个反应的化学方程式:

___________________________。

(2)写出赤铁矿被CO还原成铁的化学方程式:________________。

(3)实验室中可用CO还原Fe2O3,在加热Fe2O3前应________,直到无________现象时才能点燃酒精灯加热,否则可能发生________现象,未反应完全的CO________(填“能”或“不能”)排放到大气中,应做________处理。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A, B, C

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