4.10 Multiple Choice Questions

Welcome to Unit 4 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 4 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 4.

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.

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1. Which of the following best describes what happens when water boils at temperatures above 100°C?

A. A chemical change occurs because chemical bonds are being broken and formed.

B. A chemical change occurs, because no chemical bonds are being broken.

C. A physical change occurs, because no chemical bonds are being broken.

D. A physical change occurs because chemical bonds are being broken and formed.

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2. What is the net ionic equation for the following chemical reaction?

A.

B.

C.

D.

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3. When 1.50 mole of hydrogen reacts with 0.50 mole of oxygen, how many grams of water are produced?

A. 1 g water

B. 1.5 g water

C. 18 g water

D. 27 g water

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4. What type of reaction is represented by the balanced chemical equation below?

A. Acid-Base Reaction

B. Oxidation-Reduction Reaction

C. Precipitation Reaction

D. Decomposition Reaction

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5. Which piece of laboratory equipment is used to determine the amount of base required to completely neutralize an acid?

A. Photospectrometer

B. Filter and Filter Paper

C. Mass Spectrometer

D. Burette

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6. What is the oxidation number of nitrogen in nitric acid?

A. -3

B. 0

C. 3

D. 5

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7. What is the conjugate acid of hydrogen phosphate?

A.

B.

C.

D.

8. Which of the elements is oxidized in the following unbalanced, redox reaction?

A. Iron (Fe)

B. Manganese (Mn)

C. Oxygen (O)

D. Hydrogen (H)

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9.  When 44.8 L of hydrogen gas is produced at STP, what mass of zinc reacted?

A. 2.00 g

B. 65.4 g

C. 131 g

D. 1460 g

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10. When 2.5 mol of methane reacts, 45 g of water is produced. What is the percent yield of the reaction?

A. 5.60%

B. 25%

C. 50%

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11. Which of the following describes the types of reaction with an appropriate justification?

A. This is an acid base reaction because a proton is transferred between the reactants.

B. This is a precipitation reaction because a solid is produced.

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12. What is(are) the product(s) of the reaction if solid magnesium and aqueous copper chloride are mixed?

A.

B.

C.

D. No reaction occurs

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13. What amount of 1.0 M HCl must be added to a 40. mL of 2.0 M LiOH in order to completely neutralize the solution?

A. 15 mL

B. 20 mL

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14. What element is reduced in the following unbalanced, chemical reaction?

A. Manganese (Mn)

B. Oxygen (O)

C. Hydrogen (H)

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15. Which piece of laboratory equipment is used to collect a precipitate?

A. Crucible

B. Filter and Filter Paper

C. Mass Spectrometer

D. Bunsen Burner