试题与答案

化学小魔术“空瓶生烟”方法如右图:A瓶中充满氯化氢气体,B瓶中充满氨气,抽开毛玻

题型:填空题

题目:

化学小魔术“空瓶生烟”方法如右图:A瓶中充满氯化氢气体,B 瓶中充满氨气,抽开毛玻璃片,瓶中产生浓浓的白烟.由此回答:

(1)若“

”表示氢原子,“

”表示氮原子,“

”表示氯原子,上述反应过程如右下图.则该反应的化学方程式为:______;根据下图,你能得出的结论是(写一条):______.

(2)如果这两个瓶子是质地较软的塑料瓶,我们将会观察到塑料瓶变瘪了,原因是:______

(3)生成物氯化铵是一种常见的化肥,它属于化肥中的______(填:氮、磷、钾)肥,此化肥不能与______物质混合使用(填“中性”或“酸性”或“碱性”).

答案:

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参考答案:A, D解析: 国家质检总局的成立,是实行政府职能转变、适应社会主义市场经济体制的需要。

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阅读理解。

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根据短文内容,判断正(T)误(F)。

( )1. Liu Mei is the same age as her cousin.

( )2. Her cousin never borrows Liu Mei's things.

( )3. Her cousin couldn't do her homework.

( )4. Her cousin borrowed Liu Mei's math book and returned it.

( )5. Liu Mei doesn't want to have a fight with her cousin because she's her best friend.

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