【題目】小華的媽媽買了一個黃金手鐲，小華想通過實驗來證實這個手鐲是不是用銅鋅合金制成的仿制品，他不能選用的試劑是( )

A．MgCl2 B．H2SO4

C．AgNO3 D．CuSO4

【答案】A

【解析】鋅銅的金屬活動性比鎂弱，故鋅銅都不能與MgCl2溶液反應，無法證明。

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