八下理化1-1
Quiz
•
Science
•
8th Grade
•
Hard
房繼誠教務處教師 房繼誠教務處教師
Used 10+ times
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13 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
如圖為鎂帶(Mg)燃燒產生氧化鎂(MgO)質量的關係圖。若取 12 公克的鎂帶與 6 公克的氧燃燒,最多可以產生幾公克的氧化鎂?〔94. 基測Ⅰ〕
英詳解
6 g of Mg can completely react with 4 g of oxygen to produce 10 g of MgO. It can be seen that: 9 g of magnesium and 6 g of oxygen completely reacted to produce 【】 g of MgO.
20
15
10
5
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
下列在物體體積變化的過程中,何者牽涉到化學變化?[95. 基測Ⅰ]
英詳解:
【】The baking soda mixes the dough and expands by heating to form a bun. The baking soda is thermally decomposed to generate carbon dioxide to expand the dough, which is a chemical change.
將氦氣灌入氣球,使氣球膨脹變大
將溫度計放入熱水中,水銀遇熱膨脹
將小蘇打混合麵糰,加熱膨脹成饅頭
將被壓扁的乒乓球投入沸水,會恢復圓球狀
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
在一個真空的密閉容器中放入甲、乙、丙、丁四種物質,於適當的條件下使其充分反應,經過一段時間後,測得相關資料如表所示。關於此反應的敘述,下列何者正確?〔101. 基測〕
英詳解:
(A) From the law of conservation of mass, it can be known that the mass of A after reaction is (6 + 1 + 2 + 32)-(25 + 2 + 【】) = 【】g;
(B) the mass change ratio of B and D is (25-1): (32-【】) = 24: 【】 = 【】;
(C) the mass of A and D is reduced and it is a reactant; (D) the mass of B is increased and it is a product; the mass of C is unchanged, it may be a catalyst or not participate in the reaction.
So choose 【】.
反應後,甲的質量為 1 公克
乙和丁的質量變化量之比為 3:4
甲和丁可能是此化學反應的反應物
乙和丙可能是此化學反應的生成物
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
在密閉容器內置入 20 公克碳酸鈣水溶液及 20 公克鹽酸水溶液,反應後會生成氯化鈣水溶液以及二氧化碳,此時容器內物質的總質量為多少公克?
英詳解:
According to the law of conservation of mass, the total mass of the reactants before the reaction will be equal to the total mass of the products after the reaction, so the total mass of the substance in the container is 【】 + 20 = 【】 (g)
20
30
40
50
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
有關化學反應發生前後的變化,下列敘述何者正確?
英詳解:
A chemical reaction is a process in which atoms in a substance are rearranged to form a new substance. According to the law of conservation of mass, the total number of atoms before and after a chemical reaction does not change, but the total number of molecules may change.
原子總數不變,分子總數不變
原子總數會變,分子總數不變
原子總數和分子總數均可能改變
原子總數不變,分子總數可能改變
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
有一反應的反應式為:甲+乙--(戊)-->丙+丁,反應前後的質量如表所示。表中 X、Y 的數值分別為下列何者?〔100. 基測Ⅱ〕
英詳解:
E is a catalyst and the mass remains unchanged after the reaction, Y = 1.30 + 30 = 7 + 【】 + X, X = 【】.
X=10,Y=0
X=9,Y=1
X=16,Y=0
X=39,Y=1
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
甲、乙、丙、丁分別代表四種不同的純物質,取 10 公克甲和 8 公克乙進行反應,其化學反應式為:2 甲+乙→丙+丁。反應後乙完全用完,甲剩下 1 公克,生成 6 公克的丙,則此化學反應生成丁多少公克?[95. 基測Ⅰ]
英詳解:
A is left with 克 1 g, which means that 9 g is used. The total weight of the reactant is 17 g, and 6 g is produced. Therefore, the weight of D is 17-【】 = 【】(g).
10 公克
11 公克
12 公克
13 公克
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