今天新航道AP小编要跟各位考生谈谈AP化学。这是理科生都喜欢的一门课，上海新航道AP课程培训中心 也开设了AP化学这门课。AP化学深受理工科学生的喜爱。如果将来留学的专业是理工科类，那么小编还是比较推荐你选择AP化学科目的，因为相对于AP物理，AP化学还是要简单一些的。今天小编给大家带来了75道经典常考的AP化学选择题，赶紧来锻炼一下吧!答案在文章结尾。

  29. The best explanation for the fact that diamond is extremely hard is that diamond crystals

  (A) are made up of atoms that are intrinsically hard because of their electronic structures

  (B) consist of positive and negative ions that are strongly attracted to each other

  (C) are giant molecules in which each atom forms strong covalent bonds with all of its neighboring atoms

  (D) are formed under extreme conditions of temperature and pressure

  (E) contain orbitals or bands of delocalized electrons that belong not to single atoms but to each crystal as a whole

  Questions 33-34

  The graph below shows the titration curve that results when 100. mL of 0.0250 M acetic acid is titrated with 0.100 M NaOH.

  33. Which of the following indicators is the best choice for this titration?

  Indicator  pH Range of Color Change

  (A) Methyl orange 3.2 - 4.4

  (B) Methyl red 4.8 - 6.0

  (C) Bromothymol blue 6.1 - 7.6

  (D) Phenolphthalein 8.2 - 10.0

  (E) Alizarin 11.0 - 12.4

  34. What part of the curve corresponds to the optimum buffer action for the acetic acid/acetate ion pair?

  (A) Point V

  (B) Point X

  (C) Point Z

  (D) Along all of section WY

  (E) Along all of section YZ

  35. A solution is made by dissolving a nonvolatile solute in a pure solvent. Compared to the pure solvent, the solution

  (A) has a higher normal boiling point

  (B) has a higher vapor pressure

  (C) has the same vapor pressure

  (D) has a higher freezing point

  (E) is more nearly ideal

  答案：26、B | 27、A | 28、E | 29、C | 30、C | 31、A | 32、B | 33、D | 34、A | 35、A | 36、B | 37、A | 38、D | 39、B | 40、D

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