论文部分内容阅读
高考在氮族元素设置考点较多,其题型有选择题、实验题(喷泉实验、硝酸及某些硝酸盐的制备)、推断题和计算题。试题常涉及环境污染、不同价态氮元素的氧化还原反应(特别是硝酸的浓度变化和氧化还原的问题)、NO_x及HNO_3的性质、气体制备(NH_3、NO、NO_2)、溶液稀释(氨水、硝酸等)。试题重视理论联系实际,学以致用,注重将氮族元素有关知识作为考查理论应用和计算题的载体,在新情景中考查对这部分知识
The college entrance examination has more test sites in the nitrogen group, and its questions include multiple-choice questions, experimental questions (fountain experiments, preparation of nitric acid and certain nitrates), inference questions and calculation questions. The test questions often involve environmental pollution, redox reactions of different valences of nitrogen (especially the concentration of nitric acid and redox problems), the properties of NO_x and HNO_3, gas preparation (NH_3, NO, NO_2), dilution of the solution (ammonia, Nitric acid, etc.) The examination questions emphasize the link between theory and practice, apply what they apply, and pay attention to the knowledge of nitrogen elements as a vehicle for the examination of theoretical applications and calculations. This knowledge is examined in new situations.