
理化八下5-4
Quiz
•
Science
•
8th Grade
•
Practice Problem
•
Medium
林汎貞 林汎貞
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在人體內進行的化學反應常需要特定酵素作為催化劑,此酵素成分本質是下列何者?
脂肪
澱粉
蛋白質
纖維素。
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
有關製作肥皂過程的敘述,下列何者錯誤?
製造肥皂時加入的酒精是催化劑,能加速反應速率
肥皂的水溶液呈鹼性
所形成的肥皂將浮在飽和食鹽水表面
肥皂是利用油脂與鹼性物質共煮而製成。
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
「起雲劑」是一種食品添加物,也是一種界面活性劑,能使原本有明顯界面、不互溶的水狀與油狀液體混合均勻而不分層。下列哪一種物質加入附圖的油水分層試管中,最能達到上述的效果?〔105.會考〕
蒸餾水
肥皂水
飽和食鹽水
葡萄糖水溶液。
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
肥皂製程中的皂化反應式可表示為:油脂+氫氧化鈉水溶液→肥皂+甘油。下列有關此反應及物質的敘述,何者正確?〔95. 基測Ⅰ〕
甘油的水溶液呈鹼性
肥皂的水溶液呈鹼性
反應後通過濾紙過濾,可將產物分離
皂化反應是酸鹼中和反應,故反應快速。
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
蔗糖、葡萄糖、澱粉及纖維素都是哪三種元素構成?
碳、硫、氮
碳、硫、氧
碳、氫、氧
氫、氧、氮。
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列各種家庭廢棄的物質中,何者可用來作為製造肥皂的主要原料?[91. 基測Ⅰ]
食醋
廢紙
回鍋油
吃剩的米飯。
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
關於有機化合物的敘述,下列何者錯誤?
澱粉、蛋白質和脂肪都是有機化合物
塑膠是人工合成的無機化合物
麵粉、脂肪是有機化合物
從石油中可以提煉出有機化合物。
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