第二章 身边的化学物质
Quiz
•
Chemistry
•
1st Grade
•
Hard

xi yang
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18 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
空气中含量最多的气体是
二氧化碳
水蒸气
氧气
氮气
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
实验室制取氧气的装置如图所示,下列有关叙述合理的是
A.锥形瓶里加入高锰酸钾固体,分液漏斗里盛放蒸馏水
B.锥形瓶里加入少量MnO2粉末,分液漏斗里盛放6%双氧水
C.集满氧气的集气瓶从水槽里取出后倒放在桌面上
D.当发生装置中液体与固体一接触产生了气泡即刻收集
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
下列物质中,可用于实验室测定空气中氧气含量的是( )
A.铁钉
B.红磷
C.木炭
D.硫粉
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
如图所示装置是某同学进行空气中氧气含量的实验探究.实验时烧杯中的水为500mL(图1).实验结束后烧杯中的水为350mL(图2).集气瓶容积为500mL.对这种现象解释合理的是( )
A.没等集气瓶冷却
,就打开止水夹
B.红磷的量不足,瓶内氧气没有消耗完
C.没有塞紧瓶塞,红磷熄灭冷却时外界空气进入瓶内
D.点燃红磷后燃烧匙插入集气瓶慢,塞紧瓶塞之前,瓶内部分空气受热选出
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列有关学习氧气知识的归纳中,不正确的是( )
A.氧气能支持燃烧
B.用带火星的木条可以检验出氧气
C.鱼类能在水中生活,说明氧气易溶于水
D.它的化学性质比较活泼,既能和金属反应,又能和非金属反应
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如图所示装置可用于测定空气中氧气的含量,实验前在集气瓶内加入少量水,并做上记号。下列说法中不正确的是
A.实验时红磷一定要足量
B.实验前一定要检查装置的气密性
C.该实验证明氧气体积约占空气总体积的
D.红磷燃烧产生大量的白雾,火焰熄灭后立刻打开弹簧夹
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
利用如图装置测定空气中氧气的含量,红磷燃烧后恢复到室温,打开弹簧夹发现进入广口瓶的液体液面高度不到广口瓶容积的 ,造成这一现象的原因不可能是
A.实验用的导气管可能太长了
B.实验装置可能漏气
C.实验中所取的红磷过量
D.实验中所取的红磷不足
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