AP Chemistry Practice Test 2021 (30 Sample Question Answers). Advanced Placement Chemistry examinations (AP Chemistry exams) practice test the sample types of questions on this AP Chemistry exam online quiz. Many times good test-taking practices can help raise your score. Check our complete chemistry practice exams, including multiple-choice and free-response questions.
AP Chemistry Practice Test 2021
The multiple-choice questions will provide you with practice on questions similar to those asked on past AP exams. These are not the exact questions, but ones that will focus you on the key AP Chemistry topics.
Test Name | AP Chemistry |
Test Type | CBT |
Total Questions | 30 |
Type of question | sample |
Time limit | 30 Minutes |
Answers | Available |
Printable PDF | upload soon |
Test Authority | The College Board |
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AP Chemistry Practice Test 1
Total Questions: 30
Time Limit: 45 Minutes
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Question 1 of 30
1. Question
1 pointsIn most of its compounds, this element exists as a monatomic cation
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Question 2 of 30
2. Question
1 pointsWhich of the following groups has the species correctly listed in order of decreasing radius?
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Question 3 of 30
3. Question
1 pointsWhich of the following elements has the lowest electronegativity?
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Question 4 of 30
4. Question
1 pointsWhich of the following represents the correct formula for hexaamminecobalt (III) nitrate?
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Question 5 of 30
5. Question
1 pointsThe discovery that atoms have small, dense nuclei is credited to which of the following?
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Question 6 of 30
6. Question
1 pointsChoose the strongest Lewis acid from the following
CH4
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Question 7 of 30
7. Question
1 points. _____Mn(OH)2 (s) + ____H3AsO4 ( aq )→_____ Mn 3(AsO4) 2(s) +_____ H2O(1)
After the above chemical equation is balanced, the lowest whole-number coefficient for water is:
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Question 8 of 30
8. Question
1 pointsA student mixes 50.0 mL of 0.10 M Fe(NO3)2 solution with 50.0 mL of 0.10 M KOH. A green precipitate forms, and the concentration of the hydroxide ion becomes very small. Which of the following correctly places the concentrations of the remaining ions in order of decreasing concentration?
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Question 9 of 30
9. Question
1 points14 H+ + 6 Fe2+ + Cr2O7 2- → 2 Cr3+ + 6 Fe3+ +7 H2O
The above reaction is used in the titration of an iron solution. What is the concentration of the iron solution if it takes 45.20 mL of 0.1000 M Cr2O7 2- solution to titrate 75.00 mL of an acidified iron solution?
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Question 10 of 30
10. Question
1 pointsManganese, Mn, forms a number of oxides. A particular oxide is 49.5% mass Mn. What is the simplest formula for this oxide?
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Question 11 of 30
11. Question
1 points2 KMnO4 + 5 H2C2O4 + 3 H2SO4 → K2SO4 + 2 MnSO4 + 10 CO2 + 8 H2O
How many moles of MnSO4 are produced when 2.0 mol of KMnO4, 2.5 mol of H2C2O4, and 3.0 mol of H2SO4 are mixed?
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Question 12 of 30
12. Question
1 pointsBa + 2 H2O → Ba(OH)2 + H2
Barium reacts with water according to the above reaction. What volume of hydrogen gas, at standard temperature and pressure, is produced from 0.400 mol of barium?
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Question 13 of 30
13. Question
1 pointsA sample of chlorine gas is placed in a container at constant pressure. The sample is heated until the absolute temperature is doubled. This will also double which of the following?
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Question 14 of 30
14. Question
1 pointsA balloon contains 2.0 g of hydrogen gas. A second balloon contains 4.0 g of helium gas. Both balloons are at the same temperature and pressure. Pick the false statement from the following list.
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Question 15 of 30
15. Question
1 pointsThe volume and pressure of a real gas are not the same as those calculated from the ideal gas equation, because the ideal gas equation does NOT take into account:
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Question 16 of 30
16. Question
1 pointsAluminum metal reacts with HCl to produce aluminum chloride and hydrogen gas. What volume of hydrogen gas, at STP, is produced when 13.5 g of aluminum is mixed with an excess of HCl?
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Question 17 of 30
17. Question
1 pointsA sample containing the gases carbon dioxide, carbon monoxide, and water vapor was analyzed and found to contain 4.5 mol of carbon dioxide, 4.0 mol of carbon monoxide, and 1.5 mol of water vapor. The mixture had a total pressure of 1.2 atm. What was the partial pressure of the carbon monoxide?
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Question 18 of 30
18. Question
1 pointsAn ideal gas sample weighing 0.548 g at 100°C and 0.993 atm has a volume of 0.237 L. Determine the molar mass of the gas.
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Question 19 of 30
19. Question
1 pointsIf a sample of He effuses at a rate of 30 mol per hour at 45°C, which of the gases below will effuse at approximately one-half the rate under the same conditions?
CO
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Question 20 of 30
20. Question
1 pointsThe energy required to produce a gaseous cation from a gaseous atom in the ground state
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Question 21 of 30
21. Question
1 pointsThe energy required to completely separate the ions from a solid is
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Question 22 of 30
22. Question
1 pointsOxidation of ClF by F2 yields ClF3, an important fluorinating agent formerly used to produce the uranium compounds in nuclear fuels: ClF(g) + F2(g) → ClF3(l). Use the following thermochemical equations to calculate ΔH°rxn for the production of ClF3:
1. 2 ClF(g) + O2(g) → Cl2O(g) + OF2(g)
ΔH° = 167.5 kJ2. 2 F2(g) + O2(g) kJ→ 2 OF2(g)
ΔH°=−43.53. 2 ClF3(l) + 2 O2(g) → Cl2O(g) + 3 OF2(g)
ΔH° = 394.1 kJ -
Question 23 of 30
23. Question
1 pointsChoose the reaction expected to have the greatest increase in entropy.
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Question 24 of 30
24. Question
1 pointsA certain reaction is nonspontaneous under standard conditions, but becomes spontaneous at lower temperatures. What conclusions may be drawn under standard conditions?
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Question 25 of 30
25. Question
1 pointsWhich of the following groups contains only atoms that are paramagnetic in their ground state?
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Question 26 of 30
26. Question
1 pointsVSEPR predicts that an IF5 molecule will be which of the following shapes?
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Question 27 of 30
27. Question
1 pointsMagnesium reacts with element X to form an ionic compound. If the ground-state electron configuration of X is 1s2 2s2
2p3 , what is the simplest formula for this compound? -
Question 28 of 30
28. Question
1 pointsWhich of the following does not have one or more π bonds?
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Question 29 of 30
29. Question
1 pointsWhich of the following is nonpolar?
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Question 30 of 30
30. Question
1 pointsThe only substance listed below that contains ionic, σ, and π bonds is:
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