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一、选择题 1.金属钠在空气中长期放置,最终生成的物质是 A.NaCl B.Na_2O_2 C.NaOH D.Na_2CO_3 2.工业上制取金属钠的方法是 A.电解食盐水 B.电解氢氧化钠溶液 C.电解熔融氯化钠 D.用H_2还原Na_2O 3.下列固体物质长期露置空气中,质量不会增加的是
First, multiple-choice questions 1. Metal sodium is placed in the air for a long period of time. The final product is A.NaCl B.Na2O2 C.NaOH D.Na2CO3. 2. The method for preparing sodium metal in industry is A. electrolysis brine B. electrolysis Sodium hydroxide solution C. Electrolysis of molten sodium chloride D. Reduction of Na2O with H2 3. The following solids are exposed to air for a prolonged period of time and the quality does not increase.