Chemistry I SOL Practice Test — Set 1 of 6
278 free Chemistry I Virginia SOL practice questions drawn from official Virginia Department of Education released tests. Pick an answer to check it instantly, or open “Show answer” to review. No signup required.
1. If a student needed to obtain 8.0 mL of a liquid for an experiment, the appropriate piece of laboratory equipment to use would be a —
Show answer
Answer: D — 10.0 mL graduated cylinder
2. How many grams of sodium chloride are required to prepare 500.0 mL of a 0.100 M solution?
Show answer
Answer: B — 2.93 g
3. Which of the following best describes why an experiment should be repeated?
Show answer
Answer: D — To verify the observed results
4. Which of these is the general formula for a double-replacement reaction?
Show answer
Answer: C — AB + XY → AY + XB
5. The correct formula of an ionic compound containing Al³⁺ and CO₃²⁻ is —
Show answer
Answer: C — Al₂(CO₃)₃
6. Which of the following orbital diagrams is incorrect because it violates Hund’s rule? Each option represents the filling of the 1s, 2s, and three 2p orbitals (2pₓ, 2pᵧ, 2p_z). Hund’s rule states that electrons occupy degenerate orbitals singly with parallel spins before pairing.
Show answer
Answer: B — Electrons fill 1s and 2s, then two electrons paired in one 2p orbital while the other 2p orbitals are empty
7. The rate of a certain reaction increases with temperature. According to the data, at 20 °C the rate is approximately half of the rate at 40 °C. To double the rate of the reaction starting at 20 °C, the temperature must be increased by approximately —
Show answer
Answer: B — 20 °C
8. Aluminum + sulfuric acid → aluminum sulfate + hydrogen gas Which of the following is the balanced chemical equation for the reaction shown above?
Show answer
Answer: B — 2Al + 3H₂SO₄ → Al₂(SO₄)₃ + 3H₂
9. W + X → Y + Z If 12.0 g of W react with 10.0 g of X to form 8.0 g of product Y, how many grams of product Z are formed?
Show answer
Answer: A — 8.0 g
10. A laboratory safety data summary for hydrochloric acid (HCl) indicates the following hazard ratings on a scale from 0 (no hazard) to 4 (extreme hazard): • Health: 3 (severe) • Flammability: 0 (none) • Reactivity: 2 (moderate) • Contact: 3 (severe, corrosive) If a lab group were using hydrochloric acid to perform a substitution reaction, which precaution would not be a concern?
Show answer
Answer: A — Flammability
11. A compound is shown to consist of hydrogen atoms bonded to a central element Z, forming molecules in which two hydrogen atoms are bonded to each Z atom (H–Z–H). Based on this bonding pattern, to which group on the periodic table does element Z most likely belong?
Show answer
Answer: C — Group 15
12. First measurement: 6.293 g Second measurement: 6.294 g Third measurement: 6.295 g If the true value of the object’s mass is 5.550 g, these data are best described as —
Show answer
Answer: A — precise but not accurate
13. Which of the following is the name of the molecule PCl₃?
Show answer
Answer: A — Phosphorus trichloride
14. What is the main similarity among elements in group 2 of the periodic table?
Show answer
Answer: B — Chemical properties
15. Four trials were conducted to determine the density of the same material. The accepted value of the density is 5.72 g/cm³. Trial 1: mass 14.5 g, volume 2.52 cm³, density 5.75 g/cm³ Trial 2: mass 28.3 g, volume 4.80 cm³, density 5.90 g/cm³ Trial 3: mass 33.1 g, volume 5.75 cm³, density 5.76 g/cm³ Trial 4: mass 55.4 g, volume 9.62 cm³, density 5.76 g/cm³ Which trial has the least amount of absolute error?
Show answer
Answer: A — 1
16. The gas with the largest volume at STP is —
Show answer
Answer: A — 10.0 g He
17. A neutral atom of aluminum-27 contains —
Show answer
Answer: C — 13 electrons, 13 protons, and 14 neutrons
18. Which of the following could cause a gaseous substance to liquefy?
Show answer
Answer: A — An increase in pressure
19. The appropriate model for a decomposition reaction is —
Show answer
Answer: A — AB → A + B
20. According to Charles’ law, the volume of a fixed amount of gas is directly proportional to —
Show answer
Answer: D — kelvin temperature
21. Four elements have the following numbers of subatomic particles: Element 1: 11 protons, 12 neutrons, 10 electrons Element 2: 1 proton, 0 neutrons, 2 electrons Element 3: 15 protons, 16 neutrons, 15 electrons Element 4: 20 protons, 20 neutrons, 18 electrons Which element is a positive ion with a charge of +1?
Show answer
Answer: A — 1
22. The energy required to melt a solid into a liquid is called —
Show answer
Answer: B — heat of fusion
23. Cations are formed when neutral atoms lose —
Show answer
Answer: A — electrons
24. What is represented by the pH of a solution?
Show answer
Answer: C — Concentration of hydrogen ions in the solution
25. The formula for dinitrogen tetroxide is —
Show answer
Answer: A — N₂O₄
26. A colored ink sample is placed on absorbent paper, and a solvent moves upward through the paper, separating the ink into distinct colored components at different heights based on differing attractions to the paper and solvent. Which laboratory technique is being used?
Show answer
Answer: A — Chromatography
27. Industrial deep-sea divers breathe a mixture of helium and oxygen to prevent nitrogen narcosis. If a diver’s tank has a total pressure of 170 atm and the partial pressure of helium is 110 atm, what is the partial pressure of oxygen?
Show answer
Answer: A — 60 atm
28. Which of the following properties decreases from left to right across a period on the periodic table?
Show answer
Answer: C — Atomic radius
29. A sample of nitrogen occupies 10.0 L at 25 °C and 98.7 kPa. What would be the volume at 20 °C and 102.7 kPa?
Show answer
Answer: B — 9.45 L
30. Arsenic is in group 15 and has five valence electrons. Which Lewis dot structure correctly represents arsenic?
Show answer
Answer: C — As with five dots, one on each side before pairing
31. The empirical formula for a substance is CH₂. If the molecular mass of the substance is 56, the molecular formula is —
Show answer
Answer: C — C₄H₈
32. H₂O(l) ⇌ H₂O(g) Water molecules in a sealed jar are in a state of dynamic equilibrium because water vapor molecules —
Show answer
Answer: A — are condensing at the same rate that others are evaporating
33. Benzene has a six-carbon ring with alternating double bonds, and each carbon is bonded to one hydrogen atom. The empirical and molecular formulas of benzene are, respectively —
Show answer
Answer: C — CH, C₆H₆
34. How many grams of nitrogen are present in 2 moles of HNO₃?
Show answer
Answer: D — 28 g
35. Which basic lab technique involves the separation of a mixture’s components through differences in particle size?
Show answer
Answer: A — Filtration
36. The pressure of an ideal gas decreases linearly as volume increases. When the volume increases from 100 mL to 150 mL, the pressure decreases by 80 kPa. According to this relationship, increasing the volume from 100 mL to 150 mL —
Show answer
Answer: A — decreases the pressure by 80 kPa
37. Al + HCl → AlCl₃ + H₂ When the equation above is balanced, the coefficient of hydrochloric acid will be —
Show answer
Answer: D — 6
38. Which of the following occurs when a reaction in solution is at equilibrium and more product is added?
Show answer
Answer: B — Equilibrium shifts to produce more reactant
39. Two identical balloons contain the same number of moles of gas. Balloon B is larger than Balloon A. Which of the following best explains this observation?
Show answer
Answer: D — The gas in Balloon B is warmer
40. The atomic number corresponds to an atom’s number of —
Show answer
Answer: A — protons
41. A vapor-pressure curve for water shows that at 70 kPa, water boils at approximately 92 °C. If the atmospheric pressure in a flask is lowered to 70 kPa, water would boil at —
Show answer
Answer: C — 92 °C
42. How many moles of copper are equivalent to 3.44 × 10²³ atoms of copper?
Show answer
Answer: A — 0.571 mol
43. Which element naturally occurs as a diatomic molecule?
Show answer
Answer: D — H
44. What is the molar mass of Al(NO₃)₃?
Show answer
Answer: D — 213 g/mol
45. What shape does the molecule BF₃ have?
Show answer
Answer: D — Trigonal planar
46. What is the mass in grams of one mole of sulfur dioxide (SO₂)?
Show answer
Answer: B — 64.1 g
47. Ca(OH)₂ + Al₂(SO₄)₃ → CaSO₄ + Al(OH)₃ When the equation above is balanced, the coefficients in order are —
Show answer
Answer: C — 3, 1, 3, 2
48. Solid magnesium has a specific heat of 1.01 J/g·°C. How much heat is given off by a 20.0 g sample when it cools from 70.0 °C to 50.0 °C?
Show answer
Answer: B — 404 J
49. How should 0.000365 be expressed in proper scientific notation?
Show answer
Answer: D — 3.65 × 10⁻⁴
50. A student performed a series of titrations to find the concentration of an unknown acid. The results are listed below. Trial 1: 0.971 M Trial 2: 0.982 M Trial 3: 1.02 M Trial 4: 0.971 M Trial 5: 0.976 M What is the mean of this set of data?
Show answer
Answer: C — 0.984 M
Chemistry I SOL practice test — FAQ
Are these Chemistry I SOL practice questions free?
Yes — this Chemistry I SOL practice test is completely free with no signup. Answer each question to check it instantly, or open "Show answer" to review.
How many Chemistry I SOL practice questions are there?
Across all sets, there are 278 Chemistry I practice questions drawn from official Virginia Department of Education released SOL tests. This set has 50.
Are these real Virginia SOL questions?
The questions are adapted from official VDOE released SOL tests for Chemistry I. SOL Prep is an independent study aid and is not affiliated with or endorsed by the Virginia Department of Education.
Practice items adapted from Virginia Department of Education released SOL tests. Practice items are provided for study purposes and are not affiliated with or endorsed by the Virginia Department of Education.