下列化学方程式能正确表示所述内容的是

题干

下列化学方程式能正确表示所述内容的是（）

A：铝片加入到稀硫酸：Al+ H₂SO₄ = Al SO₄ + H₂↑

B：氢氧化钠变质：2NaOH + CO₂ = Na₂CO₃ + H₂O

C：实验室制备氧气：2H₂O $\underline{\underline{通电}}$ 2H₂↑ + O₂↑

D：铁丝在氧气中燃烧：4Fe + 3O₂ $\underline{\underline{点燃}}$ 2Fe₂O₃

上一题下一题 0.0难度选择题更新时间:2017-09-06 11:52:48

B

Name	Li Mei
Age	13
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