竹筷乾餾的過程中包裹鋁箔的主要目的為何?
第五章

Quiz
•
Chemistry
•
8th Grade
•
Medium

CHEN HSI CHUAN
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40 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
使竹筷均勻受熱,加速實驗過程
避免乾餾產物的逸散
隔絕空氣加熱
使竹筷和鋁箔發生化學變化
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
當竹筷用鋁箔包裹烘烤後,殘留在鋁箔上的固體己其特性為何?
己不可以燃燒
己是純物質
其外觀與顏色與原本竹筷相同
其主要的成分是碳
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
將竹筷包裹鋁箔在火上烘烤,進行乾餾後的產物與其特性如下圖所示 實驗過程中,乾餾出的氣體產物甲、乙、丙為何?
NH3、H2O、N2
CO、CH4、H2
He、O2、Ar
Cl2、Ar、H2O
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
從竹筷乾餾分解的產物中可以發現,竹筷可能含有以下哪些元素?(甲)氫;(乙)氧;(丙)氮;(丁)碳。
甲乙丙
乙丙丁
甲丙丁
甲乙丁
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列哪一物質乾餾後,和有機物乾餾後的結果不同?
米飯
食鹽
麵粉
蔗糖
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
剛完成製造肥皂的實驗,關於製造肥皂的過程
有關肥皂的製作過程,下列何者正確?
酒精和油脂為反應物,肥皂和氫氧化鈉為生成物
加入酒精可使油脂和鹼性溶液均勻反應
肥皂會沉在飽和食鹽水的底部
加熱可減緩皂化反應的速率,以免發生爆炸
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
關於肥皂的特性,下列敘述何者錯誤?
肥皂的pH值大於7
肥皂可以分解油脂
肥皂不溶於水中
肥皂的密度比飽和食鹽水小
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