有关“铁”的中考题归类解析(国外英文资料).doc

有关“铁”的中考题归类解析(国外英文资料) An analysis of the classification of iron in senior high school entrance examination I. Analysis of questions about iron and human health In 1., in order to prevent iron deficiency anemia, the human body must ensure adequate iron intake. The iron here refers to... A. iron element B. iron element C. D. iron oxide hydroxide Analysis: the body for the iron, the intake of substances containing ferrous ions soluble compounds, such as ferrous lactate, ferrous sulfate and so on. Thus, the iron here refers to iron. The answer is B. 2. cases of the study found that long-term use of Chinas invention of the wok cooking, can effectively reduce the occurrence of iron deficiency anemia, the reason is ______________; if the cooking often add vinegar, the effect will be better, the reason is _________________. The main question is the chemical properties of the reaction between iron and acid. Answer: in the stir fry the trace iron enters the food, and reacts with the hydrochloric acid in the human body acid (hydrochloric acid) the reaction to be absorbed the iron; the vinegar in the edible vinegar reacts with the iron in the iron pot, produces the iron which can be absorbed by the human body. Two. Analysis of questions about corrosion and protection of iron and steel Example 3. in the following circumstances, the cast iron gas pipeline buried in the ground shall be the slowest corrosion rate A. in moist, loose, breathable soil B. in acid moist soil C. in dry, dense, airtight soil D. is found in more sandy soil Iron corrosion is a chemical reaction occurring under the combined action of iron, oxygen and water. Otherwise, iron will not rust. Iron corrosion refers to the chemical reaction of iron with any other substance, such as iron and acid reaction. The answer is C. Example 4.. The following methods do not act as antirust A. retains rust on iron products B. galvanized on the surface of iron products C. oiled the metal appliances D. brushed the paint on the s