单选题:下列仪器,常用于物质分离的是()。①漏斗 ②蒸发皿 ③托盘天平 ④分液漏斗 ⑤蒸馏烧瓶 ⑥量筒 ⑦燃烧匙A①②⑤⑥B①②④⑤C②③⑤⑥D③④⑥⑦

题目内容:

下列仪器,常用于物质分离的是()。

①漏斗 ②蒸发皿 ③托盘天平 ④分液漏斗 ⑤蒸馏烧瓶 ⑥量筒 ⑦燃烧匙

A①②⑤⑥

B①②④⑤

C②③⑤⑥

D③④⑥⑦

答案解析:

下列实验现象描述正确的是( )A磷在空气中燃烧,产生大量的烟雾B电解水的实验中,负极产生的气体能使带火星的木条复燃C在CO还原氧化铜的实验中,固体的颜色由红色变

下列实验现象描述正确的是( )A磷在空气中燃烧,产生大量的烟雾B电解水的实验中,负极产生的气体能使带火星的木条复燃C在CO还原氧化铜的实验中,固体的颜色由红色变黑色D铁在氧气中燃烧,火星四射,生成黑色的固体

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