下列有关实验现象的描述错误的是（ ）
A．红磷在空气中燃烧时产生大量白烟
B．铁放在硫酸铜溶液中其表面有红色物质析出
C．细铁丝在纯氧气中燃烧时火星四射
D．氯化铵固体与熟石灰混合研磨产生无味气体
A、红磷在空气中燃烧的现象是：发出黄白色火焰，放出大量的热，产生大量的白烟，所以正确．
B、铁与硫酸铜溶液反应的现象是：溶液由蓝色变成浅绿色，铁表面有红色物质析出，所以正确．
C、细铁丝在纯氧气中燃烧的现象是：剧烈燃烧，火星四射，放出大量的热，生成一种黑色固体，所以正确．
D、氯化铵与熟石灰反应产生有刺激性气味的气体，所以错误．
故选D．
| 情景交际。 | |
| A: Look! What's that? B: Sorry, I don't know. Let's ask Han Mei. A: 1______ C: It's a cup. A: A cup? It's very strange. I've never seen a cup with three legs. C: Yeah. It was used in the old days. A: 2______ C: It was used for drinking wine. A: 3______ C: It was made of metal. B: Hmm. It's interesting, isn't it? A: Yeah. Look! There's a teapot in a bowl. B: 4______ C: That's not a teapot. It was used for serving wine. The big bowl was used for keeping the wine warm. B: 5______ C: When the bowl was filled with hot water, the wine would get warm. A: That's a good idea. Thank you, Han Mei. I've learnt a lot about old Chinese inventions today. C: Me too. | |
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