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第Ⅰ卷 一、选择题 1.某试管内装有约占其容积1/10的溶液,则溶液的体积是( ) (A)约1毫升 (B)约2毫升 (C)约3毫升 (D)无法判断 2.纯水在100℃和20℃时的pH值前者比后者( ) (A)大于 (B)小于 (C)等于 (D)不能确定 3.下列物质有固定沸点的是( ) (A)汽水 (B)重水 (C)溴水 (D)氯水 4.pH值均为11、体积相等的KOH溶液和氨水,分别用蒸馏水稀释100倍,稀释后两溶液的pH值前者比后者( ) (A)大于 (B)小于 (C)等于 (D)不能肯定 5.已知氢化锂(LiH)属于离子晶体,它跟水反应可以放出氢气。下列有关叙述中,正确的是( )
Volume I I. Multiple-choice questions 1. In a test tube containing approximately 1/10 of its volume of solution, the volume of the solution is () (A) about 1 ml (B) about 2 ml (C) about 3 ml (D ) Unable to judge 2. The pH of pure water at 100°C and 20°C is higher than the latter () (A) is greater than (B) is less than (C) is equal to (D) cannot be determined 3. The following materials have a fixed boiling point ( (A) Soda water (B) Heavy water (C) Bromine water (D) Chlorine water 4. KOH solution and aqueous ammonia with pH values of 11 equal in volume, diluted 100 times with distilled water, and the pH of the two solutions after dilution Than the latter () (A) is greater than (B) less than (C) equals (D) is not certain 5. Known lithium hydride (LiH) is an ionic crystal, which reacts with water to release hydrogen. In the following related narratives, the correct one is ()