以下哪種氣體可用向下導氣法收集?
中三B化學練習(T1-A)
Quiz
•
Chemistry
•
1st - 2nd Grade
•
Medium
Used 7+ times
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14 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
氫氣
氨氣
二氧化碳
甲烷
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列哪項可能引致本生燈發生「縮火」？
氣體的供應不足夠, 氣孔半開
氣體的供應不足夠, 氣孔全開
氣體的供應足夠, 氣孔關閉
氣體的供應不足夠, 氣孔全開
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
上圖哪項代表本生燈火焰的溫度由高至低的排列次序?
X>Y>Z
X > Z > Y
Z > Y > X
Z > X > Y
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
利用分餾可把空氣中的氧和氮分離出來，因為氧和氮具有不同的
熔點
密度
沸點
在水中的溶解度
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
排氣集氣法不能有效收集氮氣的原因是
氮氣是無色的。
氮氣的密度與空氣的密度非常相近。
氮氣十分不活潑。
氮氣能與空氣反應
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
碳酸鈣的化學式
CaCo3
CaCl2
CaCO3
Cacl2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
過氧化氫的化學式
2 H2O
2 H2O2
H2O2
H2O
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