107國中自然2下_1-3
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Other
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7th - 9th Grade
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Practice Problem
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Medium
Yu Liu
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在化學反應式aN2+bH2→cNH3中,a、b、c各為最簡單整數的平衡係數。請問下列敘述何者正確?
a=3
b=2
c=1
a+b+c=6
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在一個化學反應中,反應物所含的原子種類與生成物所含原子種類的關係,下列敘述何者正確?
反應物較多
生成物較多
一樣多
資料不足,無法比較
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
一化學反應式:碳酸鈣+鹽酸→氯化鈣+水+二氧化碳,若已知反應物中有鈣原子20個,則完全反應後,生成物中有多少個鈣原子?
10個
20個
30個
40個
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
已知氫+氧→水,則下列相關的敘述何者錯誤?
水是一種化合物
生成物(水)的性質和反應物(氫和氧)的性質相似
反應前、後,總質量不會改變
水分子的組成只包含氫原子和氧原子
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
有關化學反應式的敘述,下列何者錯誤?
化學反應式表示實際發生的化學反應,不能憑空杜撰
用「→」表示化學反應的方向
化學反應式即化學式
化學反應式中,反應物與生成物的原子數目必須相等
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
甲和乙反應產生丙,結果如圖所示,則甲、乙、丙中共含有幾種原子?(●及○分別代表不同的原子)
4種
3種
2種
1種
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
關於化學反應式的寫法原則,以下何者錯誤?
「→」表示反應進行方向
反應物和生成物不只一種時,以「+」連接
反應式左、右的分子數目相同
必須加上係數平衡才算完成
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