Chemical Reactions Quiz

What type of reaction involves two or more substances forming a single product?

• Decomposition

• Synthesis

• Single Replacement

• Combustion

Which of the following represents a double-replacement reaction?

• Pb(NO₃)₂ + 2KI → PbI₂ + 2KNO₃

• 2Na + Cl₂ → 2NaCl

• CaCO₃ → CaO + CO₂

• 2H₂ + O₂ → 2H₂O

The gain of electrons during a chemical reaction is called:

• Oxidation

• Decomposition

• Reduction

• Synthesis

Tags

NGSS.HS-PS1-1

The molar mass of CO₂ is approximately:

• 12 g

• 44 g

• 28 g

• 18 g

In the reaction Cu + 2AgNO₃ → 2Ag + Cu(NO₃)₂, which element is reduced?

• Copper (Cu)

• Silver (Ag)

• Nitrogen (N)

• Oxygen (O)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A reaction where electrons are transferred from one reactant to another is called a:

• Synthesis reaction

• Redox reaction

• Decomposition reaction

• Combustion reaction

What happens to calcium when it reacts with oxygen?

• It gains electrons

• It loses electrons

• It forms a gas

• It breaks down

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which factor increases reaction rate by exposing more reactant particles?

• Temperature

• Stirring

• Surface area

• Catalyst

What type of reaction involves one element replacing another in a compound?

• Double Replacement

• Synthesis

• Single Replacement

• Combustion

Which of the following is an example of a decomposition reaction?

• 2Na + Cl₂ → 2NaCl

• CaCO₃ → CaO + CO₂

• Cu + 2AgNO₃ → 2Ag + Cu(NO₃)₂

• CH₄ + 2O₂ → CO₂ + 2H₂O