原子量:C—12 H—1 O—16 Fe—56 Zn—65 Cu—64 Mg—24 K—39 N—14 一、选择题(共40分,1～30题每题1分,31～35题每题2分)每题只有一个正确答案,将其标号填在括号内。 1.下列变化不属于化学变化的是( )。 (A)酚酞试液遇无色的NaOH溶液变红 (B)CO_2使澄清的石灰水变浑浊 (C)活性炭使红色的品红溶液褪色 (D)CO_2使紫色的石蕊试液变红 Atomic weight: C-12H-1O- 16Fe-56Zn-65Cu-64Mg-24K-39N- 14 First, multiple-choice questions (40 points in total, 1 to 30 questions, 1 point for each question, 31 to 35 2 points for each question.) There is only one correct answer for each question, and its number is enclosed in parentheses. 1. The following changes are not chemical changes (). (A) Phenolphthalein test solution turns red in colorless NaOH solution (B) CO 2 turbidity of clear lime water (C) Activated carbon decolorizes the red magenta solution (D) CO 2 turns purple litmus test solution to red