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WorksheetsChemical Reactions Quiz
Total questions: 23
Worksheet time: 19mins
What happens every time you light a candle, bake a cake, take a breath, or even think?
A physical change occurs
A chemical reaction starts
Nothing happens
A biological process begins
How do chemists describe and explain what happens during a chemical reaction?
By writing chemical equations
By drawing diagrams
By conducting experiments
By using physical models
What is a chemical equation?
A) A tool used to measure the temperature of a reaction
B) A basic tool that scientists use to describe what is happening in a chemical reaction
C) A method to calculate the speed of a reaction
D) A way to determine the color change in a reaction
What is the general form of a chemical equation?
A) products → reactants
B) reactants → products
C) reactants + products
D) products + reactants
What is created by replacing the word reactant and product with their chemical names?
Chemical formula
Word equation
Chemical reaction
Molecular structure
Which of the following is an example of a word equation?
H2 + O2 -> H2O
Calcium carbonate + Sulfuric acid -> Calcium sulfate + Carbon dioxide + Water
Na + Cl -> NaCl
C6H12O6 + O2 -> CO2 + H2O
What is a chemical equation?
A) A representation of a chemical reaction using words
B) A representation of a chemical reaction using chemical formulas
C) A representation of a chemical reaction using pictures
D) A representation of a chemical reaction using numbers only
What is a balanced chemical equation?
An equation where the number of atoms of each element is the same on both sides.
An equation where the number of molecules is the same on both sides.
An equation where the number of compounds is the same on both sides.
An equation where the number of electrons is the same on both sides.
What is the balanced chemical equation for the reaction between calcium carbonate (CaCO₃) and sulfuric acid (H₂SO₄)?
CaCO₃ + H₂SO₄ → CaSO₄ + CO₂ + H₂O
CaCO₃ + H₂SO₄ → CaSO₄ + CO + H₂O
CaCO₃ + H₂SO₄ → CaSO₄ + CO₂ + H₂
CaCO₃ + H₂SO₄ → CaSO₄ + CO + H₂
How many oxygen atoms are present in the reactants of the balanced chemical equation CaCO₃ + H₂SO₄ → CaSO₄ + CO₂ + H₂O?
5
6
7
8
In the balanced chemical equation CaCO₃ + H₂SO₄ → CaSO₄ + CO₂ + H₂O, how many hydrogen atoms are present in the products?
1
2
3
4
What does the law of conservation of mass state?
During a chemical reaction, atoms can be created or destroyed.
During a chemical reaction, atoms cannot be created or destroyed.
During a chemical reaction, mass can be created or destroyed.
During a chemical reaction, mass cannot be conserved.
Which of the following is a balanced chemical equation?
CaCO₃ + H₂SO₄ → CaSO₄ + CO₂ + H₂O
CaCO₃ + H₂SO₄ → CaSO₄ + CO₂
CaCO₃ + H₂SO₄ → CaSO₄ + H₂O
CaCO₃ + H₂SO₄ → CaSO₄ + CO₂ + H₂
In the balanced chemical equation CaCO₃ + H₂SO₄ → CaSO₄ + CO₂ + H₂O, how many oxygen atoms are present in the reactants?
5
6
7
8
In the balanced chemical equation CaCO₃ + H₂SO₄ → CaSO₄ + CO₂ + H₂O, how many hydrogen atoms are present in the products?
1
2
3
4
What is the balanced chemical equation for the reaction between calcium carbonate (CaCO₃) and sulfuric acid (H₂SO₄)?
CaCO3+H2SO4→CaSO4+CO2+H2O
CaCO3+H2SO4→CaSO4+H2+CO2
CaCO3+H2SO4→CaSO4+H2O+O2
CaCO3+H2SO4→CaSO4+H2O+CO
What do subscripts in a chemical equation indicate?
The number of molecules present
The number of atoms of a particular element present
The total mass of the reactants
The speed of the reaction
What do coefficients in a chemical equation determine?
The number of atoms of a particular element present
The total energy released in the reaction
The number of the entire atom/molecules/compound present
The temperature at which the reaction occurs
In the chemical equation 2H₂ + O₂ → 2H₂O, what are the products?
H₂ and O₂
H₂O
O₂
H₂
In the chemical reaction H₂ + O₂ -> 2H₂O, how many oxygen atoms are present on the reactant side?
A) 1
B) 2
C) 3
D) 4
In the chemical reaction CH₄ + Cl₂ -> CCl₄ + HCl, how many chlorine atoms are present on the product side?
A) 1
B) 2
C) 3
D) 5
In the chemical reaction Fe₂O₂ + C₂ -> Fe + CO₂, how many carbon atoms are present on the reactant side?
A) 1
B) 2
C) 3
D) 4
In the chemical reaction Al₂Cl₂ + H₂ -> 2HCl + Al₂, how many aluminum atoms are present on the product side?
A) 1
B) 2
C) 3
D) 4
