常温下，下列各组离子在指定条件下能大量共存的是_刷题宝

题干

常温下，下列各组离子在指定条件下能大量共存的是（）

A：使甲基橙呈黄色的溶液中：Na⁺、Fe³⁺、Cl^-、NO₃^-

B：使pH 试纸显蓝色的溶液中：K⁺、Na⁺、OH^-、SO₄^2-

C：由水电离出的c(H⁺)=1×10^-12mol·L^-1的溶液中：Na⁺、Mg²⁺、Cl^-、HCO₃^-

D：与铝反应生成H₂ 的溶液中： NH₄⁺、Ba²⁺、NO₃^-、ClO^-

上一题下一题 0.0难度选择题更新时间:2016-12-28 12:10:40

答案(点此获取答案解析）

B

同类题1

从图中直接可以得出的结论有 ( )

同类题2

阅读理解。

My name is Zhang Peng. I have a friend. His name is John. He has a grandpa and a grandma. They are seventy years old. They are at home. John's father works in a school. His mother is a doctor. John is a good student. They are very busy. They all get up early in the morning. John often helps his grandparents cook breakfast. There is a big garden and many young trees in front of his house. We can play games there. It's great.

同类题3

11月23日，我国宣布：划设防空识别区。防空识别区是基于国防需要划设的预警区域。（）

同类题4

下列物理量中，属于矢量的是（）

同类题5

选出与你所听内容相符的图片（）

小学学科试题库

初中学科试题库

高中学科试题库