
課題一 地球
Quiz
•
Chemistry
•
7th - 9th Grade
•
Practice Problem
•
Hard
Chemistry Aristo
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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪個危險警告標籤應貼在盛有氧的集氣瓶上?
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪個組合正確?
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪項正確描述在焰色試驗中物質產生的焰色?
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪項有關液態空氣的分餾的陳述正確?
A. 分餾過程利用空氣成分的密度差異,把它們分離出來。
B. 氮最先被沸騰出來,原因是它的沸點最低。
C. 在淨化空氣的過程中,會把經過濾的空氣冷卻至–80°C,以除去二氧化碳和氧。
D. 在空氣液化的過程中,會把經淨化的空氣重複壓縮和冷卻,直至温度降至–100°C。
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪幅圖正確顯示由元素和化合物組成的混合物的粒子排列方式?
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
某氣體不能使有餘燼的木條重燃,而它的沸點是–196°C。該氣體是甚麼?
A. 氧
B. 水蒸氣
C. 氮
D. 二氧化碳
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
電解海水的實驗裝置如圖所示。
盛載氣體X和Y的集氣瓶上分別應貼有甚麼危險警告標籤?
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