問題詳情
17.下列各組物質中各有一個是純物質,另一個是混合物。(甲)
;(乙)空氣與N2(g);(丙)金銅合金與Au(s);(丁)柴油與純己烷,假定在一般高中實驗室,用實驗方法來區別純物質與混合物,在50〜150°C間測其沸點就可以區別出來者為何?
(A)甲、乙
(B)甲、丁
(C)乙、丁
(D)甲、丙。

(A)甲、乙
(B)甲、丁
(C)乙、丁
(D)甲、丙。
參考答案
答案:B
難度:適中0.5
統計:A(0),B(0),C(0),D(0),E(0)
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