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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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5 Tests
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1. Test

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

Which sample is a pure substance?

Please select an answer first.

Correct answer: A

The correct answer is Distilled water.

  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: Distilled water contains one compound, H₂O, while the other samples contain more than one substance.
  3. Confirm the classification: The correct answer is Distilled water.

Distilled water contains one compound, H₂O, while the other samples contain more than one substance.

2. QuestionMultiple choice

What is an element?

Please select an answer first.

Correct answer: B

The correct answer is A pure substance made of one type of atom.

  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: An element contains only one kind of atom and cannot be chemically broken into a simpler substance.
  3. Confirm the classification: The correct answer is A pure substance made of one type of atom.

An element contains only one kind of atom and cannot be chemically broken into a simpler substance.

3. QuestionMultiple choice

What is a compound?

Please select an answer first.

Correct answer: C

The correct answer is A substance formed when atoms of different elements are chemically bonded.

  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 compound has atoms of different elements joined in fixed chemical relationships.
  3. Confirm the classification: The correct answer is A substance formed when atoms of different elements are chemically bonded.

A compound has atoms of different elements joined in fixed chemical relationships.

4. QuestionMultiple choice

Which sample is a homogeneous mixture?

Please select an answer first.

Correct answer: D

The correct answer is Salt dissolved evenly in water.

  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 homogeneous mixture has a uniform composition throughout the sample.
  3. Confirm the classification: The correct answer is Salt dissolved evenly in water.

A homogeneous mixture has a uniform composition throughout the sample.

5. QuestionMultiple choice

Which sample is a heterogeneous mixture?

Please select an answer first.

Correct answer: A

The correct answer is Soil containing visible pieces of rock and organic material.

  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 heterogeneous mixture has visibly or measurably different parts with a nonuniform composition.
  3. Confirm the classification: The correct answer is Soil containing visible pieces of rock and organic material.

A heterogeneous mixture has visibly or measurably different parts with a nonuniform composition.

6. QuestionMultiple choice

Which is a physical property of copper?

Please select an answer first.

Correct answer: B

The correct answer is It conducts electricity..

  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: Electrical conductivity can be observed without changing copper into a different substance.
  3. Confirm the classification: The correct answer is It conducts electricity..

Electrical conductivity can be observed without changing copper into a different substance.

7. QuestionMultiple choice

Which is a chemical property of iron?

Please select an answer first.

Correct answer: C

The correct answer is It can react with oxygen and water to form rust..

  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: The ability to form rust describes how iron reacts and changes into new substances.
  3. Confirm the classification: The correct answer is It can react with oxygen and water to form rust..

The ability to form rust describes how iron reacts and changes into new substances.

8. QuestionMultiple choice

Which is a physical change?

Please select an answer first.

Correct answer: D

The correct answer is Ice melting into liquid water.

  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: Melting changes the state of H₂O but does not change its chemical identity.
  3. Confirm the classification: The correct answer is Ice melting into liquid water.

Melting changes the state of H₂O but does not change its chemical identity.

9. QuestionMultiple choice

Which observation is evidence of a chemical change?

Please select an answer first.

Correct answer: A

The correct answer is A solid forms when two clear solutions are mixed..

  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: Formation of a new solid, called a precipitate, can indicate that a new substance formed.
  3. Confirm the classification: The correct answer is A solid forms when two clear solutions are mixed..

Formation of a new solid, called a precipitate, can indicate that a new substance formed.

10. QuestionMultiple choice

What does conservation of mass mean in a closed chemical system?

Please select an answer first.

Correct answer: B

The correct answer is The total mass of reactants equals the total mass of products..

  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: Atoms are rearranged during a reaction, so the total mass remains constant in a closed system.
  3. Confirm the classification: The correct answer is The total mass of reactants equals the total mass of products..

Atoms are rearranged during a reaction, so the total mass remains constant in a closed system.

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