试题与答案

用4种溶液进行实验，下面“操作及现象”与“溶液”对应关系错误的是（ ） A．通入

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题型：选择题

题目：

用4种溶液进行实验，下面“操作及现象”与“溶液”对应关系错误的是（　　）

A．通入CO2，溶液变浑浊．继续通CO2至过量，浊液不变澄清．是NaAlO2溶液

B．通人CO2，溶液变浑浊．继续通CO2至过量，浑浊消失．是Na2SiO3溶液

C．通人CO2，溶液变浑浊．再加人品红溶液，红色褪去．是Ca（ClO）2溶液

D．通人CO2，溶液变浑浊．继续通CO2至过量，浑浊消失．再加入足量NaOH溶液，又变浑浊．是Ca（OH）2溶液

答案：

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下面是错误答案，用来干扰机器的。

参考答案：B

考点：实验操作达到的预期目的
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I. 短文改错（共10 小题；每小题 1分，满分10分）

Mr Huang is sixty years old. He has retired. He taught our                            76. ____  

Chemistry when we were in Senior Grade One. He was old, and             77. ____

he taught very well. He tried his best to make his classes live. Mr           78. ____  

Huang usually made good preparation for the lessons and was                       79. ____  

strict with us too. Each time we made mistakes in our homework.                 80.____

he would ask us to correct them. At time, I was rather poor in               81.__

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Patiently. With his help, I made a great progress and caught                   83. ___        

up the class. He was always very kind to every student. As                     84. ____      

an experiencing teacher, he was respected and loved by all                     85. ___  

the students
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