4~2 化學平衡
Quiz
•
Chemistry
•
8th - 9th Grade
•
Practice Problem
•
Hard
CHEN HSI CHUAN
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18 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列何者不是影響化學平衡的因素?
溫度
濃度
物質的表面積
壓力
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
將未開封的礦泉水,靜置於桌上,隔天發現瓶身上方內壁有小水滴附著,下列敘述何者正確?
瓶內的水不再蒸發
瓶內的水蒸氣不再凝結
水的蒸發速率小於水蒸氣的凝結速率
水的蒸發速率等於水蒸氣的凝結速率
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
化學反應:2CrO42-+2H+ ⇌ Cr2O72-+H2O,下列敘述何者錯誤?
加入硝酸鉀溶液後,反應不移動
CrO42-在鹼中較安定
pH 減少時Cr2O72-較易存在
平衡時,Cr2O72-的莫耳數:CrO42-的莫耳數=1:2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
有關化學反應的平衡狀態,下列敘述何者正確?
只有可逆反應才可達到反應的動態平衡狀態
在反應過程中,移除生成物會中斷正反應的進行
一個可逆反應只有一種平衡狀態
達到平衡狀態時,反應物的消耗速率小於生成物的生成速率
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
配製一杯飽和糖水後將容器密閉。發現杯底仍有未溶解的糖存在。則下列敘述何者正確?
此糖水是過飽和溶液
沉澱在底部的溶質,會隨著時間而改變形狀
糖的溶解與析出仍未達平衡
糖水已達平衡,糖不再有任何的溶解與析出
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在A +B⇌ C +D 反應達成平衡後加入一些A,則下列敘述何者錯誤?
正反應較原來快
B的濃度漸減
未達新平衡時,正反應速率較逆反應速率快
達到新平衡時,正、逆反應均停止
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列哪一個現象不屬於可逆反應?
飽和食鹽水中食鹽的溶解與析出
設計精準的溫度計內,酒精的汽化與液化
含水硫酸銅加熱產生無水硫酸銅與水
麵包長霉
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