
CH4段考複習
Quiz
•
Science
•
8th Grade
•
Practice Problem
•
Hard
卓桂如 卓桂如
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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
已知氯水的化學平衡為Cl2+H2O ↔H
++Cl-+HClO,因氯有劇毒,必須如何處理才能減少溶液中氯
的含量?
加入適量氫氧化鈉的溶液
加入適量的鹽酸
加入適量的氯化鈣溶液
加入適量的食鹽溶液
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在所有條件(控制變因)均相同下,將濃度分別為0.1M、0.2M、0.3M相同體積的硫代硫酸鈉溶液
與相同濃度、體積的鹽酸反應,並測量反應速率(R)與溫度(T)的關係,試問其關係曲線應為
下列何者?
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在2CrO42-(黃色)+2H+↔Cr2O72-(橘紅色)+H2O的平衡反應中,下列敘述何者正確?
達平衡後,[CrO42-]=[Cr2O72-]
達平衡後,顏色不再變化
達平衡後,溶液中[CrO42-]:[Cr2O72-]=2:1
達平衡後,正反應速率小於逆反應速率
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在雙氧水製造氧氣的實驗中,在錐形瓶內的二氧化錳磨成粉末會造成何種結果?
可增加實驗中產物氧氣的生成量
可加快氧氣的生成速率
降低雙氧水的分解速率
二氧化錳磨成粉末不影響反應速率
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
當一可逆反應達平衡時,下列說法何者錯誤?
反應物和生成物濃度一定相等
正反應速率等於逆反應速率
是一種動態平衡
若含有氣體則反應需在定溫的密閉系統中
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
關於催化劑對反應速率及化學平衡的影響,下列哪一項敘述正確?
催化劑能改變反應的平衡狀態
催化劑可改變反應速率,但不能改變平衡
催化劑因可改變反應速率,所以平衡也改變了
催化劑對反應速率及平衡根本沒有影響
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在密閉瓶子中,碳酸鈣與酸會進行如右的平衡反應:CaCO3+2H+Ca2++CO2+H2O,當達平衡後,再加入下列哪一種溶液,會使平衡往正反應的方向進行?
NH4Cl 溶液
Ca(CH3COO)2 溶液
CH3COONa 溶液
加入少量 NaCl
溶液
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