層析法
Quiz
•
Chemistry
•
10th Grade
•
Easy
江孟儒 江孟儒
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
操作色層分析法的過程中,最不需要哪一項設備?
濾紙
沖提液
量筒
圓底燒杯
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
沖提液總共跑了30cm,目標物質跑了15cm,試問其Rf為何?
0.15
0.3
0.5
1
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
假設一目標物質其Rf=0.4,若沖提液跑的總距離=20cm,則目標物質跑的距離為何?
0.8
8
80
敢選這個選項的死當
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
若A物質對沖提液的附著能力強,B物質對濾紙的附著能力強,則下列敘述何者正確?
A物質移動距離長
A物質移動速率慢
B物質移動距離長
B物質移動速率快
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
試求黑點的Rf值
0.3
0.6
0.9
1.2(敢選這個選項的數學死當)
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
關於色層分析法的實驗內容,下列敘述何者正確?
沖提液一定為水溶液
濾紙在實驗前要事先用沖提液『潤洗』一次
色層分析法是利用附著力的差異將物質加以分離
更換沖提液,不會影響Rf值
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
有一色素A較易溶於水,另一色素B較易溶於有機溶劑石油醚中,今將這兩種色素混和,以水為展開液做濾紙層析,實驗後的圖形應為下列何者?
A上B下
B上A下
AB一同在上
AB一同在下
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