封閉錐形瓶內裝有高溫水蒸氣和少量的水,在天平上與砝碼平衡,如右圖所示,經過一段時間,部分水蒸氣凝結成水,則最終天平呈現何種狀態?

8上L2(全)

Quiz
•
Science
•
2nd Grade
•
Medium
麗文 洪
Used 1+ times
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41 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
錐形瓶端下傾
砝碼端下傾
維持平衡狀態
錐形瓶端先下傾,然後恢復平衡狀態。
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列何者為鐵的化學性質?
沸點高
在潮溼的空氣中容易生鏽
熔點高
密度大。
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列何者是物理變化?
光合作用
鋁罐變形
消化作用
酒在空氣中變酸。
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列何者是化學變化?
糖溶於水
砂和水混合
磁鐵吸引鐵釘
紙張燃燒。
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
加熱食鹽水濾液可得食鹽晶體,主要是因為食鹽具有何種特性?
食鹽之沸點比水高
食鹽之沸點比水低
食鹽會溶解在水中
食鹽不會溶解在水中。
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以粒子的觀點而言,採用過濾法分離物質,主要是運用物質之間具備下列哪一種性質差異?
活性
延性及展性
顆粒大小
導電性。
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
汽油的沸點在70℃∼ 120℃範圍內,依此數據判斷汽油屬於何種物質?
混合物
純物質
雜質
條件不足,無法判斷。
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