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Chemical Equations Practice Tests

These Grade 10 Science practice tests develop chemical equation notation, reactants, products, coefficients, subscripts, state symbols, atom conservation, charge balance, and equation balancing.

Skills covered

  • Reading reactants, products, arrows, coefficients, subscripts, state symbols, catalysts, and reversible arrows
  • Writing and balancing synthesis, decomposition, replacement, combustion, neutralization, and precipitation equations
  • Counting atoms and charge and applying conservation of matter to chemical equations
  • Using coefficients without changing chemical formulas or substance identities
  • Interpreting word equations, skeleton equations, aqueous notation, polyatomic ions, and reaction conditions

How to use these practice tests

Write the correct formulas first, count each element on both sides, and adjust coefficients only. Finish by checking atoms, charge when relevant, state symbols, and the smallest whole-number ratio.

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

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Grade 10 Chemical Equations Practice Tests

Practice Grade 10 Science questions about equation parts, reactants, products, coefficients, subscripts, state symbols, balancing atoms and charge, and chemical notation.

Choose the best answer. Read the notation, count atoms and charge, use coefficients to balance, and preserve chemical formulas and reaction identities.

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

Which is the balanced equation for hydrogen peroxide decomposition?

Please select an answer first.

Correct answer: A

The correct answer is 2H₂O₂ → 2H₂O + O₂.

  1. Read the equation notation: Identify reactants, products, coefficients, subscripts, state symbols, arrows, and any reaction conditions.
  2. Count atoms or charge: Two hydrogen peroxide molecules produce two water molecules and one oxygen molecule, conserving all atoms.
  3. Check the final equation: The correct answer is 2H₂O₂ → 2H₂O + O₂.

Two hydrogen peroxide molecules produce two water molecules and one oxygen molecule, conserving all atoms.

2. QuestionMultiple choice

Which equation represents a balanced double-replacement reaction between lead nitrate and potassium iodide?

Please select an answer first.

Correct answer: B

The correct answer is Pb(NO₃)₂ + 2KI → PbI₂ + 2KNO₃.

  1. Read the equation notation: Identify reactants, products, coefficients, subscripts, state symbols, arrows, and any reaction conditions.
  2. Count atoms or charge: Two iodide ions and two nitrate groups are required to balance the lead and potassium ions.
  3. Check the final equation: The correct answer is Pb(NO₃)₂ + 2KI → PbI₂ + 2KNO₃.

Two iodide ions and two nitrate groups are required to balance the lead and potassium ions.

3. QuestionMultiple choice

Which is the balanced equation for aluminum reacting with hydrochloric acid?

Please select an answer first.

Correct answer: C

The correct answer is 2Al + 6HCl → 2AlCl₃ + 3H₂.

  1. Read the equation notation: Identify reactants, products, coefficients, subscripts, state symbols, arrows, and any reaction conditions.
  2. Count atoms or charge: Two aluminum, six chlorine, and six hydrogen atoms appear on each side.
  3. Check the final equation: The correct answer is 2Al + 6HCl → 2AlCl₃ + 3H₂.

Two aluminum, six chlorine, and six hydrogen atoms appear on each side.

4. QuestionMultiple choice

Which is the balanced equation for ethanol combustion?

Please select an answer first.

Correct answer: D

The correct answer is C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O.

  1. Read the equation notation: Identify reactants, products, coefficients, subscripts, state symbols, arrows, and any reaction conditions.
  2. Count atoms or charge: The equation balances two carbon, six hydrogen, and seven oxygen atoms on both sides.
  3. Check the final equation: The correct answer is C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O.

The equation balances two carbon, six hydrogen, and seven oxygen atoms on both sides.

5. QuestionMultiple choice

Which is the balanced equation for sulfuric acid reacting with sodium hydroxide?

Please select an answer first.

Correct answer: A

The correct answer is H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O.

  1. Read the equation notation: Identify reactants, products, coefficients, subscripts, state symbols, arrows, and any reaction conditions.
  2. Count atoms or charge: Two sodium hydroxide units balance the two hydrogen ions and form two water molecules.
  3. Check the final equation: The correct answer is H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O.

Two sodium hydroxide units balance the two hydrogen ions and form two water molecules.

6. QuestionMultiple choice

Which is the balanced equation for carbon monoxide reducing iron(III) oxide?

Please select an answer first.

Correct answer: B

The correct answer is Fe₂O₃ + 3CO → 2Fe + 3CO₂.

  1. Read the equation notation: Identify reactants, products, coefficients, subscripts, state symbols, arrows, and any reaction conditions.
  2. Count atoms or charge: Two iron atoms, six oxygen atoms, and three carbon atoms are present on each side.
  3. Check the final equation: The correct answer is Fe₂O₃ + 3CO → 2Fe + 3CO₂.

Two iron atoms, six oxygen atoms, and three carbon atoms are present on each side.

7. QuestionMultiple choice

Which coefficient set balances the equation Al + H₂SO₄ → Al₂(SO₄)₃ + H₂?

Please select an answer first.

Correct answer: C

The correct answer is 2, 3, 1, 3.

  1. Read the equation notation: Identify reactants, products, coefficients, subscripts, state symbols, arrows, and any reaction conditions.
  2. Count atoms or charge: Two aluminum atoms and three sulfate groups require 2Al + 3H₂SO₄ → Al₂(SO₄)₃ + 3H₂.
  3. Check the final equation: The correct answer is 2, 3, 1, 3.

Two aluminum atoms and three sulfate groups require 2Al + 3H₂SO₄ → Al₂(SO₄)₃ + 3H₂.

8. QuestionMultiple choice

Which is the balanced equation for calcium reacting with water?

Please select an answer first.

Correct answer: D

The correct answer is Ca + 2H₂O → Ca(OH)₂ + H₂.

  1. Read the equation notation: Identify reactants, products, coefficients, subscripts, state symbols, arrows, and any reaction conditions.
  2. Count atoms or charge: One calcium, four hydrogen, and two oxygen atoms occur on each side.
  3. Check the final equation: The correct answer is Ca + 2H₂O → Ca(OH)₂ + H₂.

One calcium, four hydrogen, and two oxygen atoms occur on each side.

9. QuestionMultiple choice

Which is the balanced equation for sodium carbonate reacting with hydrochloric acid?

Please select an answer first.

Correct answer: A

The correct answer is Na₂CO₃ + 2HCl → 2NaCl + H₂O + CO₂.

  1. Read the equation notation: Identify reactants, products, coefficients, subscripts, state symbols, arrows, and any reaction conditions.
  2. Count atoms or charge: Two sodium and chlorine atoms and the correct hydrogen, carbon, and oxygen totals are conserved.
  3. Check the final equation: The correct answer is Na₂CO₃ + 2HCl → 2NaCl + H₂O + CO₂.

Two sodium and chlorine atoms and the correct hydrogen, carbon, and oxygen totals are conserved.

10. QuestionMultiple choice

Which is the balanced equation for silver nitrate reacting with sodium chloride?

Please select an answer first.

Correct answer: B

The correct answer is AgNO₃ + NaCl → AgCl + NaNO₃.

  1. Read the equation notation: Identify reactants, products, coefficients, subscripts, state symbols, arrows, and any reaction conditions.
  2. Count atoms or charge: The one-to-one ion exchange conserves silver, sodium, nitrate, and chloride groups.
  3. Check the final equation: The correct answer is AgNO₃ + NaCl → AgCl + NaNO₃.

The one-to-one ion exchange conserves silver, sodium, nitrate, and chloride groups.

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