
Chemical Equation Concepts
Authored by Reddi Sekhar
Others
9th Grade
Used 1+ times

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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of balancing a chemical equation?
To speed up the reaction
To ensure the law of conservation of mass is obeyed.
To balance the pH level
To create a chemical reaction
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Identify the type of chemical reaction: 2H₂ + O₂ → 2H₂O
Decomposition reaction
Combustion reaction
Synthesis reaction
Single displacement reaction
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the equation CH₄ + 2O₂ → CO₂ + 2H₂O, what are the reactants?
CH₄ and CO₂
CH₄ and O₂
O₂ and H₂O
CO₂ and H₂O
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the coefficient '2' in 2H₂O represent?
Amount of hydrogen atoms
Number of water molecules
Atomic weight of oxygen
Type of bond
5.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
State the Law of Conservation of Mass in relation to chemical equations.
Total mass of products = Total mass of reactants
Total mass of reactants = Total mass of products
Total mass of reactants = Total mass of products
Total mass of reactants = Total mass of reactants
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Balance the equation: Al + O₂ → Al₂O₃
2Al + 3O₂ → 2Al₂O₃
3Al + 2O₂ → 3Al₂O₃
Al + O₂ → AlO₃
2Al + 2O₂ → 2Al₂O₃
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What type of chemical reaction is represented by the equation: 2NaCl → 2Na + Cl₂
Single displacement reaction
Decomposition reaction
Synthesis reaction
Combustion reaction
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