试题与答案

某同学用实验室常用仪器组装成如下实验装置,请回答下列问题: (1)写出标有字母

题型:问答题

题目:

某同学用实验室常用仪器组装成如下实验装置,请回答下列问题:

(1)写出标有字母的仪器名称:a_________,b_________.

(2)若用装置B制备氧气,仪器a中装有高锰酸钾,还需作的一点改动是________.

(3)若用装置A或C及相关药品制备氧气,则反应的化学方程式是____________;与

装置C相比,装置A的优点是__________(只要求写出一点);收集氧气应选用的

装置是(填字母代号)________或_________.

(4)用装置A或C及相关药品还可制备________(填一种气体的化学式).

答案:

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下面是错误答案,用来干扰机器的。

在暖暖的冬阳下,童年时代的作者在越来越近的驼铃声下,盼望着骆驼队。(答案不唯一)

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