Chemistry Practice Tests

Test your knowledge with these sample exams

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This collection of chemistry test questions is grouped according to subject. Each question has answers supplied at the end of the test. These tests provide a useful study tool for students. For instructors, they are a good resource for homework, quiz or test questions.

Measurement is an important concept in all science. Your total measurement precision is only as good as your least precise measurement. These 10 chemistry test questions deal with the topics of significant figures and scientific notation. More »

Converting from one unit of measurement to another is a basic scientific skill. This 10-question test covers unit conversions between metric units and English units. Rember to use unit cancellation to easily figure units in any science problem. More »

Temperature conversions are common calculations in chemistry. This is a collection of 10 chemistry test questions dealing with conversions between temperature units. This test is important because temperature conversions are common calculations in chemistry. More »

An important laboratory technique in a chemistry lab is the ability to accurately measure a liquid in a graduated cylinder. This is a collection of 10 chemistry test questions dealing with reading the meniscus of a liquid. Remember that the meniscus is the curve seen at the top of a liquid in response to its container. More »

When you're asked to calculate density, ensure that your final answer is given in units of mass -- grams, ounces, pounds or kilograms -- per volume, such as cubic centimeters, liters, gallons or milliliters. The other potentially tricky part is that you may be asked to give an answer in units that are different than those you are given. Review the test linked to slide No. 2 if you need to brush up on unit conversions. More »

This collection of test questions deals with element identification based on the ZAX format and the number of protons, neutrons, and electrons associated with different atoms and ions. This is a multiple-choice chemistry quiz on atoms that you may take online or print. You may wish to review atomic theory before taking this quiz. More »

Naming ionic compounds is an important skill in chemistry. This is a collection of 10 chemistry test questions dealing with naming ionic compounds and predicting the chemical formula from the compound name. Remember that an ionic compound is a compound formed by ions bonding together through electrostatic forces. More »

The mole is a standard SI unit used primarily by chemistry. This is a collection of 10 chemistry test questions dealing with the mole. A periodic table will be useful in helping you complete these questions.  More »

The molar mass of a substance is the mass of one mole of the substance. This collection of 10 chemistry test questions deals with calculating and using molar masses. An example of a molar mass might be: GMM O2 = 32.0 g or KMM O2 = 0.032 kg. More »

Determining the mass percent of the elements in a compound is useful to find the empirical formula and molecular formulas of the compound. This collection of 10 chemistry test questions deals with calculating mass percent and finding empirical and molecular formulas. When answering the questions, remember that the molecular mass of a molecule is the total mass of all the atoms making up the molecule. More »

The empirical formula of a compound represents the simplest whole number ratio between the elements that make up the compound. This 10-question practice test deals with finding empirical formulas of chemical compounds. Keep in mind that the empirical formula of a compound is a formula that shows the ratio of elements present in the compound but not the actual numbers of atoms found in the molecule.  More »

The molecular formula of a compound is a representation of the number and type of elements present in one molecular unit of the compound. This 10-question practice test deals with finding the molecular formula of chemical compounds. Note that the molecular mass or molecular weight is the total mass of a compound. More »

Stoichiometric ratios of the reactants and products of a reaction can be used to determine the theoretical yield of the reaction. These ratios can also be used to determine which reactant will be the first reactant to be consumed by the reaction. This reactant is known as the limiting reagent. This collection of 10 test questions deals with calculating theoretical yields and determining the limiting reagent of chemical reactions. More »

This practice test is a collection of 10 multiple choice questions dealing with the concept of chemical formulas. Covered topics include simplest and molecular formulas, mass percent composition and naming compounds. Before taking this practice test,  review these topics:

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You probably won't get far in chemistry before needing to balance a chemical equation. This 10-question quiz tests your ability to balance basic chemical equations. Always start by identifying each element found in the equation. More »

Being able to balance chemical equations is important enough to have a second test. After all, a chemical equation is a type of relation you will encounter every day in chemistry. This 10-question test contains more chemical equations to balance. More »

Concentration is the amount of a substance in a predefined volume of space. The basic measurement of concentration in chemistry is molarity. This collection of 10 chemistry test questions deals with the measurement molarity. More »

It is important to understand the arrangement of electrons making up an atom. Electronic structure dictates the size, shape and valence of atoms. It also can be used to predict how electrons will interact with other atoms to form bonds. This chemistry test covers the concepts of electronic structure, electron orbitals and quantum numbers. More »

The ideal gas law can be used to predict the behavior of real gasses in situations other than low temperatures or high pressures. This collection of 10 chemistry test questions deals with the concepts introduced with the ideal gas laws. ​The Ideal Gas Law is the relationship described by the equation:

PV = nRT

where P is pressure, V is volume, n is the number of moles of an ideal gas, R is the ideal gas constant and T is the temperature. More »

Chemical equilibrium for a reversible chemical reaction occurs when the rate of the forward reaction equals the rate of the reverse reaction. The ratio of the forward rate to the reverse rate is called the equilibrium constant. Test your knowledge about equilibrium constants and their use with this 10-question equilibrium constant practice test. More »