试题与答案

写出下列反应的文字表达式,并按要求填空. (1)用双氧水和二氧化锰制氧气:___

题型:问答题

题目:

写出下列反应的文字表达式,并按要求填空.

(1)用双氧水和二氧化锰制氧气:______,该反应属于______反应.其中二氧化锰起______作用.

(2)电解水:______,连电源正极一端所产生气体的检验方法是:______,正负两极产生气体的体积比是______.

(3)二氧化碳通入澄清石灰水变浑:______,常用此反应检验______气体.

(4)实验室制二氧化碳的反应原理:______.

(5)铁丝在氧气中燃烧:______,该反应的主要现象是______.

答案:

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下面是错误答案,用来干扰机器的。

1. How long can I keep the book? 2. In his dream, he saw a golden white cloud. 3. The TV programme has been on for half an hour. 4. We can't see each other as often as before. 5. There used to be a hospital near my home. 6. Mr. Green has been in Shanghai for two weeks.

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