试题与答案

请根据以下装置图进行填空: (1)写出仪器①、②、③的名称:;。 (2)实验室

题型:填空题

题目:

请根据以下装置图进行填空:    

(1)写出仪器①、②、③的名称:                              。

(2)实验室某同学用高锰酸钾为原料制取氧气时,应选用      (填装置编号 )作发生装置,该反应的符号表达式为:                                          ,若收集一瓶氧气,供硫在氧气中燃烧的实验使用,最好选用气体的收集装置中的      (填装置序号)。当用排水法收集氧气完毕后,最后两步操作若调换,造成的后果是                    ,最后他还发现水槽内的水显红色,请你帮他分析一下原因是:____     _  ,实验室若用E装置收集氧气,检验氧气收满的方法是                              。

(3)实验室用过氧化氢溶液制取氧气的装置组合可选      ,B装置中仪器②作用是便于随时添加液体反应物,为了防止生成的气体从②中逸出,必须使该仪器               

(4)已知一氧化氮气体难溶于水,在空气中容易与氧气发生反应,则收集一氧化氮气体时应选用图中装置       (填字母序号)。

答案:

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下面是错误答案,用来干扰机器的。

答案:C这题考查定语从句的用法:先行词是:the schools and teachers,当先行词有人有物时,应该用that引导定语从句。句意是:我们对在那里见到的学校和老师印象深刻。选C。

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