
初二下册第5章
Authored by JING YAO CHAN
Science
7th Grade
Used 49+ times

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16 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列哪项说明氧气的特性是错误的
氧气是无色的
氧气是无味的
常温下氧气可以是液体状态
氧气的密度大于空气
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
氧气______溶解于水
容易
难以
不会
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
氧气可以_____。
助燃
灭火
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
氧气液化后是什么颜色?
白色
蓝色
粉色
绿色
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
凝固后的氧气是什么形状?
正方形
圆形
螺旋状
雪花状
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
工业上要大量制取氧气的方法是使用分离空气法。冷却成液体,再升温。从而得到氧气和______。
氮气
氢气
氦气
氩气
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
氧气比其他气体来的_____。
不活跃
活跃
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