八下自然5-1
Quiz
•
Chemistry
•
8th Grade
•
Practice Problem
•
Medium
白 皮
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12 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
食鹽乾餾前後都是白色,而白糖乾餾前是白色,乾餾後卻變為黑色,這是因為白糖含有何種元素?
碳
氫
氧
氯
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列物質何者為有機物?
食鹽
蒸餾水
甘蔗
大理石
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列何者不是木材乾餾後的氣體產物?
氫氣
甲烷
二氧化碳
氧氣
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以鋁箔包覆竹筷,接著以酒精燈加熱鋁箔,操作竹筷乾餾的實驗,如附圖所示。下列有關竹筷乾餾的敘述,何者錯誤?
竹筷乾餾會產生許多碳和氫的化合物,故為有機化合物
竹筷乾餾時必須以鋁箔包起來,主要是因為鋁箔傳熱快、溫度高
竹筷乾餾必須隔絕空氣加熱
竹筷乾餾屬於吸熱的化學變化
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
有機化合物都含有碳這種共同的元素,但含碳的物質並不全都是有機化合物。下列物質何者一般認為不是有機化合物?
酒精
塑膠
碳酸
肥皂
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
用鋁箔包著竹筷進行乾餾實驗時,最先看到的白煙無法點燃,如附圖所示,請問此白煙的主要成分為何?
水
氫氣
氧氣
甲烷
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
早期的科學家認為:有機化合物均是來自生命體。直到十九世紀初,下列何種人工合成物質被發現,此觀念才有了轉變?
尿素
尿酸
碳酸鈣
硫酸
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