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同分异构体这一考点是高中化学的难点和重点,在全国高考新课标卷中一般能占到6~15分,在客观题中一般有一道选择题,6分,在主观题中占到4~6分。例如,在2011年的全国新课标Ⅱ卷中,同分异构体的考查占到了15分;在2012年的全国新课标Ⅱ卷中,同分异构体的考查占11分;2013年的全国新课标卷Ⅰ卷中占12分;在全国新课标Ⅱ卷中占6分。然而学生的得分率是很低的。经过近几年的教学,总结出了解决同分异构体问题的一些方法,下面介绍一下,供读者参考。解决同分异构体的核心方法为基元法和骨架插入
Isomers this test site is the difficulty and focus of high school chemistry, in the national college entrance examination new curriculum standard can generally account for 6 to 15 points, in the objective questions generally have a multiple-choice questions, 6 points, in subjective questions Accounted for 4 to 6 points. For example, in the National New Curriculum II in 2011, the isomers accounted for 15 points; in the 2012 National New Curriculum II, the isomers accounted for 11 points; 2013 In the National New Curriculum Vol. I in the volume of 12 points; in the National New Curriculum Standard II volume accounted for 6 points. However, the student’s scoring rate is very low. After teaching in recent years, some methods for solving isomers have been summarized. The following is a brief introduction for readers’ reference. The core methods for solving isomers are Primitives and Skeleton Insertion