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Chemistry Practice Tests

These Grade 10 Science practice tests introduce matter, elements, compounds, mixtures, atomic structure, periodic patterns, chemical bonding, equations, reactions, catalysts, and energy changes.

Skills covered

  • Classifying pure substances, elements, compounds, homogeneous mixtures, and heterogeneous mixtures
  • Distinguishing physical and chemical properties, physical and chemical changes, and conservation of mass
  • Identifying protons, neutrons, electrons, atomic number, isotopes, ions, cations, anions, and valence electrons
  • Using groups, periods, metals, nonmetals, noble gases, halogens, atomic radius, and reactivity patterns on the periodic table
  • Comparing ionic and covalent bonding, molecules, formula units, balanced equations, reaction types, catalysts, and energy changes

How to use these practice tests

Start by classifying the substances or particles described. Then track atoms, charge, bonding, energy, and evidence of chemical change. Use formulas and coefficients carefully when interpreting chemical equations.

For more Grade 10 Science practice, return to the Grade 10 Science category.

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Grade 10 Chemistry Practice Tests

Practice Grade 10 Science questions about matter, elements, compounds, mixtures, atomic structure, periodic trends, bonding, chemical equations, reactions, and energy.

Choose the best answer. Classify matter, identify atomic particles, use periodic trends, distinguish bonding types, and interpret chemical reactions and energy changes.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

What are reactants in a chemical equation?

Please select an answer first.

Correct answer: A

The correct answer is The substances present at the start of a chemical reaction.

  1. Identify the chemistry concept: Determine whether the question asks about matter, atoms, elements, compounds, mixtures, properties, bonding, or reactions.
  2. Use the scientific evidence: Reactants are consumed or rearranged during a reaction to form products.
  3. Confirm the classification: The correct answer is The substances present at the start of a chemical reaction.

Reactants are consumed or rearranged during a reaction to form products.

2. QuestionMultiple choice

What are products in a chemical equation?

Please select an answer first.

Correct answer: B

The correct answer is The new substances formed by a chemical reaction.

  1. Identify the chemistry concept: Determine whether the question asks about matter, atoms, elements, compounds, mixtures, properties, bonding, or reactions.
  2. Use the scientific evidence: Products are the substances produced after atoms are rearranged.
  3. Confirm the classification: The correct answer is The new substances formed by a chemical reaction.

Products are the substances produced after atoms are rearranged.

3. QuestionMultiple choice

What is a synthesis reaction?

Please select an answer first.

Correct answer: C

The correct answer is A reaction in which two or more substances combine to form one product.

  1. Identify the chemistry concept: Determine whether the question asks about matter, atoms, elements, compounds, mixtures, properties, bonding, or reactions.
  2. Use the scientific evidence: Synthesis has the general pattern A + B → AB.
  3. Confirm the classification: The correct answer is A reaction in which two or more substances combine to form one product.

Synthesis has the general pattern A + B → AB.

4. QuestionMultiple choice

What is a decomposition reaction?

Please select an answer first.

Correct answer: D

The correct answer is A reaction in which one compound breaks into two or more simpler substances.

  1. Identify the chemistry concept: Determine whether the question asks about matter, atoms, elements, compounds, mixtures, properties, bonding, or reactions.
  2. Use the scientific evidence: Decomposition has the general pattern AB → A + B.
  3. Confirm the classification: The correct answer is A reaction in which one compound breaks into two or more simpler substances.

Decomposition has the general pattern AB → A + B.

5. QuestionMultiple choice

What happens in a single-replacement reaction?

Please select an answer first.

Correct answer: A

The correct answer is One element replaces another element in a compound..

  1. Identify the chemistry concept: Determine whether the question asks about matter, atoms, elements, compounds, mixtures, properties, bonding, or reactions.
  2. Use the scientific evidence: Single replacement has the pattern A + BC → AC + B or a related arrangement.
  3. Confirm the classification: The correct answer is One element replaces another element in a compound..

Single replacement has the pattern A + BC → AC + B or a related arrangement.

6. QuestionMultiple choice

What happens in a double-replacement reaction?

Please select an answer first.

Correct answer: B

The correct answer is Ions in two compounds exchange partners to form two new compounds..

  1. Identify the chemistry concept: Determine whether the question asks about matter, atoms, elements, compounds, mixtures, properties, bonding, or reactions.
  2. Use the scientific evidence: Double replacement has the pattern AB + CD → AD + CB.
  3. Confirm the classification: The correct answer is Ions in two compounds exchange partners to form two new compounds..

Double replacement has the pattern AB + CD → AD + CB.

7. QuestionMultiple choice

What is combustion?

Please select an answer first.

Correct answer: C

The correct answer is A reaction in which a substance reacts rapidly with oxygen and releases energy.

  1. Identify the chemistry concept: Determine whether the question asks about matter, atoms, elements, compounds, mixtures, properties, bonding, or reactions.
  2. Use the scientific evidence: Combustion commonly involves oxygen and releases energy as heat and often light.
  3. Confirm the classification: The correct answer is A reaction in which a substance reacts rapidly with oxygen and releases energy.

Combustion commonly involves oxygen and releases energy as heat and often light.

8. QuestionMultiple choice

What is an endothermic reaction?

Please select an answer first.

Correct answer: D

The correct answer is A reaction that absorbs energy from the surroundings.

  1. Identify the chemistry concept: Determine whether the question asks about matter, atoms, elements, compounds, mixtures, properties, bonding, or reactions.
  2. Use the scientific evidence: Endothermic reactions require a net input of energy from the surroundings.
  3. Confirm the classification: The correct answer is A reaction that absorbs energy from the surroundings.

Endothermic reactions require a net input of energy from the surroundings.

9. QuestionMultiple choice

What is an exothermic reaction?

Please select an answer first.

Correct answer: A

The correct answer is A reaction that releases energy to the surroundings.

  1. Identify the chemistry concept: Determine whether the question asks about matter, atoms, elements, compounds, mixtures, properties, bonding, or reactions.
  2. Use the scientific evidence: Exothermic reactions release net energy, often as heat or light.
  3. Confirm the classification: The correct answer is A reaction that releases energy to the surroundings.

Exothermic reactions release net energy, often as heat or light.

10. QuestionMultiple choice

What does a catalyst do?

Please select an answer first.

Correct answer: B

The correct answer is It speeds a reaction by lowering the activation energy without being consumed overall..

  1. Identify the chemistry concept: Determine whether the question asks about matter, atoms, elements, compounds, mixtures, properties, bonding, or reactions.
  2. Use the scientific evidence: A catalyst provides an alternative pathway with lower activation energy and remains chemically available after the reaction.
  3. Confirm the classification: The correct answer is It speeds a reaction by lowering the activation energy without being consumed overall..

A catalyst provides an alternative pathway with lower activation energy and remains chemically available after the reaction.

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