下列说法中,不正确的是A.形成化学键吸收能量,破坏化学键释放能

下列说法中,不正确的是

A.形成化学键吸收能量,破坏化学键释放能量

B.14 g乙烯和丙烯的混合物中原子的物质的量为3 mol

C.向豆浆中加入硫酸钙溶液会产生聚沉现象

D.H+、Fe2+、Na+在溶液中不能大量共存

答案

A    形成化学键放出能量,破坏化学键吸收能量,A错误。14 g 乙烯和丙烯中原子为

×3=3 mol,B正确。CaSO4使豆浆胶体聚沉,C正确。Fe2+被HNO3氧化,D正确。

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