25分鐘測驗:課題十四 物料化學
Quiz
•
Chemistry
•
9th - 12th Grade
•
Practice Problem
•
Hard
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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
有關纖維素和甲殼素在聚合物類型、結構和性質上的分別,哪項正確?
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
聚合物X具圖中的結構。X的單體的系統名稱是甚麼?
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
圖中顯示甲殼素的部分結構。當把甲殼素的單體與濃氫氯酸一起加熱一段時間,其中一個生成物是X。哪項可能是X的結構?
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
圖中顯示脲甲醛的部分結構。下列哪項或哪些有關脲甲醛的陳述不正確?
(1) 脲甲醛從它的單體生成時,有HCl分子消去。
(2) 脲甲醛是極佳的熱絕緣體,因此可用來製造煙灰缸。
(3) 脲甲醛由聚合物鏈構成,這些聚合物鏈以離子鍵互相連結。
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
聚合物Y可由圖中的單體生成。哪項或哪些有關聚合物Y的陳述正確?
A. 只有(1)
B. 只有(2)
C. 只有(1)和(3)
D. 只有(2)和(3)
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪項陳述正確解釋高密度聚乙烯(HDPE)和低密度聚乙烯(LDPE)在密度上的分別?
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪項陳述正確解釋為甚麼硫化橡膠較天然橡膠堅硬和有彈性?
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