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Gaokao Chemistry Practice Question

3. (6 分）下列反应中, 反应后固体物质增重的是（）

A.氢气通过灼热的 $\mathrm{CuO}$ 粉末
B.二氧化碳通过 $\mathrm{Na}_{2} \mathrm{O}_{2}$ 粉末
C.铝与 $\mathrm{Fe}_{2} \mathrm{O}_{3}$ 发生铝热反应
D.将锌粒投入 $\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}$ 溶液

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