满分5 > 高中化学试题 >

下列有关氯水的表述不正确的是 ( ) A.氯水可以导电,说明氯气是电解质 B.氯...

下列有关氯水的表述不正确的是                            (    )

       A.氯水可以导电,说明氯气是电解质

       B.氯水中含有7种微粒,因此可与AgNO3、FeBr2等多种物质反应

       C.蓝色石蕊试纸放人氯水中先变红后褪色

       D.向氯水中加入碳酸钙粉末,能提高溶液中HClO的浓度

 

A 【解析】
复制答案
考点分析:
相关试题推荐

某烃的一种同分异构体在核磁共振氢谱中出现一组峰,该烃的分子式可以是(    )

       A.C3H8                   B.C4H10                  C.C5H12                  D.C6H14

 

查看答案

如下图所示装置,密闭容器内分别在可移动的活塞两边充入空气(已知空气体积占整个容器容积的l/4)和H2、O2的混合气体,在标准状态下,若将H2、O2的混合气体点燃引爆.活塞先左弹,恢复原温度后,活塞右滑停留于容器的中央.则原来H2、O2的体积比最接近于                       (    )

说明: 6ec8aac122bd4f6e

       A.2:7                   B.5:4                   C.2:1                   D.7:2

 

查看答案

下列有关煤、石油的说法正确的是                         (    )

       A.石油裂解得到的汽油是纯净物

       B.石油分馏和煤干馏都是化学变化

       C.干馏煤可以得到甲烷、苯和氨等重要化工原料\

       D.水煤气是通过煤的液化得到的气体燃料

 

查看答案

下列化学用语,应用正确的是                                                                  (    )

       A.硝基苯的结构简式是:

       B.乙炔的电子式是:说明: 6ec8aac122bd4f6e

       C.乙醚分子的球棍模型是:说明: 6ec8aac122bd4f6e

       D.甲酸中存在一CHO和—COOH两种官能团

 

查看答案

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    

(14分)某中学课外兴趣小组用惰性电极电解饱和食盐水(含少量Ca2+、Mg2+)作系列探究,装置如下图所示:

说明: 6ec8aac122bd4f6e

(1)电解时,甲同学发现电极a附近溶液出现浑浊,请用离子方程式表示原因____________

(2)一段时间后,你认为C中溶液可能出现的现象是______,请用离子方程式表示原因________________________

(3) 实验结束后,乙同学将A中的物质冷却后加入到H2S溶液中发现有气泡出现,但加人到稀盐酸中却没有任何现象。请用化学方程式和简要的文字解释原因____________

(4) 随着反应的进行,兴趣小组的同学们都特别注意到D中溶液红色逐渐褪去。他们对溶液红色褪去主要原因提出了如下假设,请你完成假设二。

假设一:B中逸出气体与水反应生成的物质有强氧化性,使红色逐渐褪去;

假设二 :__________________________________________。

(5) 请你设计实验验证上述假设一,写出实验步骤及结论___________________________________________________________________________

 

查看答案
试题属性

Copyright @ 2008-2019 满分5 学习网 ManFen5.COM. All Rights Reserved.