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随着素质教育的全面推进,新课程改革的不断深入,中考改革也在不断地深化.借学科渗透,考综合能力已成为中考命题的趋势和热点.下面例举几道考查氢气知识的理化渗透题,仅供同学们学习时参考.一、浮力与化学反应例1一个不与稀硫酸反应的物体放入盛有稀硫酸的烧杯中,物体有一部分沉没在溶液中,另一部分浮出溶液面,现将几颗锌粒放入溶液中,则物体在溶液中的位置()
With the advancement of quality education and the deepening of new curriculum reforms, the reforms in the examinations are constantly deepening. With the penetration of disciplines, the comprehensive ability of examinations has become the trend and hot spot of the examination proposition. Here are some examples of physical and chemical penetration of hydrogen knowledge. Questions are for reference only when students learn. 1. Buoyancy and Chemical Reactions Example 1 An object that does not react with dilute sulfuric acid is placed in a beaker containing dilute sulphuric acid. A part of the object sinks in the solution and the other part floats out of the solution. , Now put a few zinc particles into the solution, the position of the object in the solution ()