单选题某金属跟盐酸反应生成氢气,该金属与锌组成原电池时,锌为负极,此金属是( ).AAlBFeCCuDMg
单选题
某金属跟盐酸反应生成氢气,该金属与锌组成原电池时,锌为负极,此金属是( ).
A
Al
B
Fe
C
Cu
D
Mg
参考解析
解析:
AD两项,该金属与Zn组成原电池时,Zn为负极,所以该金属应位于Zn的后面;C项,因该金属与盐酸反应生成氢气,所以它应是金属活动性顺序中氢以前的金属;由此可知,该金属在金属活动性顺序中的位置是在氢前锌后,因此该金属为Fe.
AD两项,该金属与Zn组成原电池时,Zn为负极,所以该金属应位于Zn的后面;C项,因该金属与盐酸反应生成氢气,所以它应是金属活动性顺序中氢以前的金属;由此可知,该金属在金属活动性顺序中的位置是在氢前锌后,因此该金属为Fe.
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