4~1 反應速率
Quiz
•
Chemistry
•
8th - 9th Grade
•
Practice Problem
•
Medium
CHEN HSI CHUAN
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18 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在實驗室中,通常將化學藥品配成溶液,其原因是可以使反應速率發生什麼變化?
增快,因為反應物的密度增加
減慢,因為反應物的濃度減小
增快,因為反應物的碰撞次數增加
減慢,因為反應物的莫耳數減少
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
有關粒子碰撞與化學反應之間的敘述,何者錯誤?
粒子一旦發生碰撞,即可產生化學反應
粒子碰撞後,原子重新排列才會產生化學反應
粒子碰撞次數愈少,化學反應速率則愈慢
粒子須具備足夠能量以產生有效碰撞,才會產生化學反應
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
甲、乙、丙三試管中所含溶液的pH值依序為3、7、12,今在三試管各加入等量且顆粒大小相等的貝殼,其反應速率由大到小依序為何?
乙>丙>甲
甲>丙>乙
丙>甲>乙
甲>乙=丙
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列何種反應其反應速率最慢?
火藥爆炸
汽油燃燒
木材點燃
鐵生鏽
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
阿芬將鐵釘分別置於兩試管中,如圖所示。後來,她發現A試管中的鐵釘生鏽情形較嚴重,由此可推論在實驗中影響鐵釘生鏽速率的因素為何?
接觸面積
濃度
溫度
顆粒大小
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
產生大量乾燥粉末狀可燃物的場所,常有爆炸的危險,其主要原因與下列哪一項因素有關?
乾燥粉末太乾燥
乾燥粉末本性較活潑
粉末顆粒較細,接觸面積較大
以上皆是
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
已知2KI+Pb(NO3)2 → 2KNO3 +PbI2↓之反應中,一般以觀察下列何者來比較此反應中反應速率的快慢?
KI之消耗量
Pb(NO3)2之消耗量
KNO3之生成量
PbI2沉澱之生成量
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