
國中自然2上ch2-3混合物的分離
Authored by 翰林出版國中自然 翰林出版國中自然
Biology
8th Grade
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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
有關食鹽與細砂分離的實驗過程中,下列哪一個實驗歩驟的順序是正確的?
過濾→溶解→蒸發→結晶
過濾→蒸發→溶解→結晶
溶解→過濾→蒸發→結晶
溶解→過濾→結晶→蒸發
2.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
承上題,哪一歩驟是利用物質的顆粒大小不同,來達到分離物質的目的?
溶解
結晶
過濾
蒸發
3.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
附表是甲、乙兩物質在A、B、C三種液體中的溶解情形,請問哪一種液體最適合用來分離甲、乙兩物質?
A
B
C
三者皆可分離甲、乙
4.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
濾紙在使用步驟中需要撕去一小角,其主要目的為下列何者?
使過濾速率加快
使濾紙在過濾時能貼緊漏斗內壁
使濾紙體積縮小
使水流速率減慢
5.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
小華不小心將砂子、木屑混在同一燒杯內,他在燒杯內加入水,便將兩者輕易分開,他是利用砂子與木屑的何種性質辦到的?
密度
硬度
質量
溶解度
6.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
過濾物由燒杯倒入漏斗時,下列何者正確?
用滴管慢慢將過濾物滴入漏斗中的濾紙上,以免濾液四濺
應將燒杯傾斜少許,用刮勺將過濾物直接送至漏斗中的濾紙上
利用燒杯尖唇使液體沿尖唇流入漏斗中的濾紙上,以免濾液四濺
利用燒杯尖唇使液體沿玻棒流入漏斗中的濾紙上,以免濾液四濺
7.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
煮燒酒雞時會加入米酒(由酒精和水組成),而烹煮過程中,首先會聞到濃濃的酒香,這是因為下列哪一原因所造成的?
米酒是純物質
酒精不溶於水中
酒精的密度小於水的密度
酒精的沸點比水低
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