國中自然2下ch4-2可逆反應與平衡
Quiz
•
Chemistry
•
8th Grade
•
Practice Problem
•
Medium
翰林出版國中自然 翰林出版國中自然
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8 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
關於含有沉澱的飽和食鹽水,下列敘述何者正確?
飽和食鹽水的食鹽分子不能再溶於水中
飽和食鹽水的沉澱速率大於溶解速率
飽和食鹽水再加熱時,溶解速率大於沉澱速率
加入催化劑,可使飽和食鹽水再溶解
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
在室溫下,某一化學反應已達到平衡,則下列各項敘述中,何者正確?
正、逆反應均停止
正、逆反應速率相等
反應物與生成物的濃度相等
反應物完全變成生成物
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
在飽和溶液中,固體的溶解速率為何?
大於溶質的析出速率
等於溶質的析出速率
小於溶質的析出速率
停止
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
欲使平衡向生成物的一方移動,則下列何者正確?(甲)增加生成物濃度;(乙)增加反應物濃度;(丙)減少反應物濃度;(丁)減少生成物濃度。
甲丙
乙丙
乙丁
甲丁
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
(甲)溫度;(乙)濃度;(丙)催化劑,以上三個因子中,何者會改變化學平衡的狀態?
僅甲乙
僅乙丙
僅甲丙
甲乙丙
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
室溫下,當一化學反應已達到平衡時,則下列有關此平衡狀態的敘述何者正確?
反應物完全耗盡
正反應和逆反應均停止
反應物和生成物濃度必相等
正反應速率等於逆反應速率
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
當可逆反應達成平衡狀態時,下列敘述何者正確?
反應物不再轉變成生成物
反應速率為零
反應物濃度等於生成物濃度
正、逆反應速率相等
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
已知反應:N2O4(無色)↔ 2NO2(紅棕色),今有一密閉的錐形瓶中裝有NO2氣體,要讓此氣體的紅棕色變淡,應使用下列哪一種方式?
將錐形瓶放入冰水中
將錐形瓶放入熱水中
將錐形瓶倒立放置
將錐形瓶放置一段時間,讓氣體的顏色變淡
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