2017 AP Chemistry化学真题系列之选择题免费下载

历年AP Calculus BC微积分BC系列

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2017 AP Chemistry Practice Exam Multiple Choice Free Download

2017 AP 化学模考选择题部分免费下载

此套Section I试卷计时1小时30分钟

共50题

仅限使用铅笔，无计算器

考试时会提供花常用的等式与常量

以及化学元素周期表

完整版下载链接见文末

部分真题预览：

1）The mass spectrum of an average sample of a pure element is shown in the figure above. Which of the following is the identity of the element?

1. Y
2. Zr
3. Nb
4. Th

2)The ideal gas law best describes the properties of which of the following gases at 0°C and 1 atm?

1. PH₃
2. HBr
3. SO₂
4. N₂

3)At 298 K and 1 atm, Br₂ is a liquid with a high vapor pressure, and Cl₂ is a gas. Those observations provide evidence that under the given conditions, the

1. forces among Br₂ molecules are stronger than those among Cl₂ molecules
2. forces among Cl₂ molecules are stronger than the Cl−Cl bond
3. Br−Br bond is stronger than the Cl−Cl bond
4. Cl−Cl bond is stronger than the Br−Br bond

4) Which of the following has the bonds arranged in order of decreasing polarity?

1. H−F > N−F > F−F
2. H−I > H−Br > H−F
3. O−N > O−S > O−Te
4. Sb−I > Sb−Te > Sb−Cl

5) To determine the moles of Fe³⁺(aq) in a 100. mL sample of an unknown solution, excess KSCN(s) is added to convert all the Fe³⁺(aq) into the dark red species FeSCN²⁺(aq) , as represented by the equation above. The absorbance of FeSCN²⁺(aq) at different concentrations is shown in the graph below.

If the absorbance of the mixture is 0.20 at 453 nm, how many moles of Fe³⁺(aq) were present in the 100. mL sample? (Assume that any volume change due to adding the KSCN(s) is negligible.)

1. 4 × 10⁻⁴ mol
2. 3 × 10⁻⁴ mol
3. 4 × 10⁻⁶ mol
4. 3 × 10⁻⁶ mol

6)The first ionization energy of an element is the energy required to remove an electron from a gaseous atom of the element (i.e., X(g) → X⁺(g) + e⁻ ). The values of the first ionization energies for the third-row elements are shown in the graph above. On the basis of the information given, which of the following reactions is exothermic?

1. Cl(g) + Mg⁺(g) → Cl⁺(g) + Mg(g)
2. Al(g) + Mg⁺(g) → Al⁺(g) + Mg(g)
3. P(g) + Mg⁺(g) → P⁺(g) + Mg(g)
4. S(g) + Mg⁺(g) → S⁺(g) + Mg(g)

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