题目:
下列化学方程式符合题意且书写正确的是( )
A.验证铜的活动性比银强 Cu+2AgCl═CuC12+2Ag
B.检验二氧化碳气体 CO2+2NaOH═Na2CO3+H2O
C.除去锌粉中少量的铁粉 Fe+CuSO4═FeSO4+Cu
D.用纯碱、熟石灰制取少量氢氧化钠 Na2CO3+Ca(OH)2═CaCO3↓+2NaOH
答案:
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