
Jr3 Quiz
Quiz
•
Chemistry
•
3rd Grade
•
Practice Problem
•
Medium
Low Khim
Used 12+ times
FREE Resource
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20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
过氧化氢H2O2是隐形眼镜片的洗液成分,下列说法正确的是
它由氢元素和氧元素组成
它由氢气和氧气组成
它由1个氢分子和1个氧分子构成
它由2个氢元素和2个氧元素构成
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列生活中获得的能量来自化学反应的是
用太阳能热水器洗热水澡
用风能发电
冬天吃火锅用固体酒精作燃料
用电饭煲煮饭
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
在下列反应中,不是置换反应的是
C + 2Fe2O3 → 4Fe + 3CO2
Fe + H2SO4 → FeSO4 + H2
4H2 + Fe3O4 → 3Fe + 4H2O
CaO+H2O → Ca(OH)2
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
某物质X在空气中燃烧的化学方程式为:
2X+13O2 → 8CO2+10H2O,
则X的化学式为
C2H5OH
H2
CH4
C4H10
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
某化合物完全燃烧,需要4.8g氧气,同时生成4.4g二氧化碳和2.7g水,则该化合物
只含碳、氢两种元素
只含碳、氧两种元素
含有碳、氢、氧三种元素
无法确定
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
根据质量守恒定律:
“8克氧气和4克氢气反应,生成12克水.”是否正确,
若不正确,其理由是
不正确,氧气有剩余
正确
不正确,氢气、氧气都没有完全反应
不正确,氢气只反应了1克
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列化常用语中,正确的是
两个氧分子:O2
氢氧化铁(III)的化学式:Fe(OH)3
2个氢原子:H2
五个钠离子:5Na+1
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