化学实验试题中有一类题是对实验图的正误进行判断。这种题型不仅能考查学生的实验基础知识,考查学生对图形的观察能力,还能考查学生的问题意识,以及对实验方案进行分析、比较、评价的能力。这类试题概括起来往往从以下几个角度来设计。一、从分离与提纯的角度去设计例1下列关于分离与提纯的设计正确的是() There is a class of questions in the chemical experiment test is to correct the experimental chart. This type of questions can not only examine students ’basic knowledge of experiment, examine the ability of students to observe graphics, but also examine students’ problem awareness and the ability to analyze, compare and evaluate experimental programs. Summarized in such questions are often designed from the following perspectives. First, from the perspective of separation and purification Design Example 1 The following separation and purification of the design is correct ()