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AP Chem

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Unit 3

3.14 Multiple Choice Questions

4 min read•december 22, 2021

AP Chemistry 🧪

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Multiple Choice Practice for Intermolecular Forces and Properties

Welcome to Unit 3 AP Chemistry Multiple Choice Questions! Grab some paper and a pencil 📄 to record your answers as you go. You can see how you did on the Unit 3 Practice Questions Answers and Review sheet once you're done. Don't worry, we have tons of resources available if you get stumped 😕 on a question. And if solo study is not your thing, join a group in Hours!

Not ready to take a quiz yet? Take a look at the Intro to Unit 3

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Facts about the test: The AP Chemistry exam has 60 multiple choice questions and you will be given 1 hour 30 minutes to complete the section. That means it should take you around 15 minutes to complete 10 questions.

*The following questions were not written by College Board and, although they cover information outlined in the AP Chemistry Course and Exam Description, the formatting on the exam may be different.

1. Which of the following temperature and pressure conditions is a real gas considered to be most ideal?

A. 500 K and 0.1 atm

B. 200 K and 0.1 atm

C. 500 K and 1 atm

D. 200 K and 1 atm

2. What is the temperature (in Celcius) of a 0.250 mol of a gas that occupies 75.0 L at 0.155 atm of pressure?

A. 566°C

B. 5.59°C

C. 293°C

D. You need to know the identity of the gas in order to determine the temperature.

3. Which of the following substances has the highest melting point?

A. Water (H_2O)

B. Methane (CH_4)

C. Chlorine Gas (Cl_2)

D. Magnesium Oxide (MgO)

4. Which of the following statements correctly identifies why carbon tetrabromide (CBr_4) has a larger boiling point than bromomethane (CH_3Br)?

A. Bromomethane is polar and has dipole-dipole forces, whereas carbon tetrabromide is nonpolar and has london dispersion forces.

B. Carbon tetrabromide is ionic while bromomethane is covalent.

C. Carbon tetrabromide is more polarizable than bromomethane, because it has more electrons.

D. Carbon tetrabromide is an unsymmetrical molecule while bromomethane is symmetrical making it nonpolar.

5. Which molecule has the highest viscosity?

A. Methanol (CH_3OH)

B. Chloromethane (CH_3Cl)

C. Liquid bromine (Br_2)

D. Nitrogen trichloride (NCl_3)

6. Which of the following substances is a network covalent solid?

A. Dry Ice (CO_2)

B. Diamond (Carbon)

C. Brass (Cu & Zn)

D. Sodium Fluoride (NaF)

7. What is the mass of sodium chloride (M = 58.44 g/mol) required to make 25 mL of a 3.5 M solution?

A. 5.11 g

B. 5110 g

C. 87.5 g

D. 87,500 g

8. Which of the following substances is most soluble in water?

A. Carbon tetrafluoride (CF_4)

B. Sulfur dichloride (SCl_2)

C. Liquid Bromine (Br_2)

D. Ethanol (CH_3CH_2OH)

9. Which type of radiation is associated with electrons transitioning between energy levels?

A. Infrared radiation

B. UV radiation

C. Microwave radiation

D. Radio Radiation

10. A 0.55 M solution of HCl has a volume of 125mL. What amount of distilled water is added to dilute the solution to 0.35 M?

A. 80. mL

B. 196 mL

C. 45 mL

D. 71 mL

11. What is the identity of a diatomic gas molecule that has a density of 2.89 g/L at 1.00 atm and 25°C?

A. Hydrogen Gas (M = 2.02 g/mol)

B. Chlorine Gas (M = 70.90 g/mol)

C. Fluorine Gas (M = 38.00 g/mol)

D. Nitrogen Gas (M = 28.02 g/mol)

12. What is the danger of heating a rigid container of helium gas?

A. The pressure of the container will increase as the temperature increases. This could cause the container to explode.

B. Heating helium gas causes it to decompose into a poisonous gas that is dangerous to inhale.

C. Heating the container will cause the average kinetic energy of the helium particles to decrease.

D. There is no danger in heating a rigid container of helium gas.

13. What is the concentration of chloride ions [Cl^-] in a 1.0 L solution that contains 55 g of magnesium chloride (MgCl_2, M = 95.21 g/mol)?

A. 0.577 M

B. 1.16 M

C. 3.46 M

D. 1.73 M

14. What is the wavelength of a photon that has an energy of 1.55x10^-19 J?

A. 1.28x10^-6 m

B. 2.34x10^14 m

C. 4.65x10^-11 m

D. 3.08x10^24 m

15. Copper sulfate creates an extraordinarily blue solution in water. Which of the following experimental techniques could a scientist use to determine the concentration of copper sulfate based on absorbance?

A. Gravimetric analysis

B. Titration

C. Mass Spectroscopy

D. Photospectroscopy