Chemical Reactions Quiz

3Mg + N₂ --> Mg₃N₂

• Synthesis 
• Decomposition
• Single displacement
• Combustion

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

2NO₂ --> N₂ + 2O₂

• Synthesis
• Decomposition
• Single displacement
• Combustion

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which chemical reaction breaks down into 2 substances?

• Double Replacement
• Single Replacement
• Synthesis
• Decomposition

Which chemical reaction switches 2 elements?

• Double Replacement
• Single Replacement
• Combustion
• Decomposition

AB + CD = AD + CB

• Double Replacement
• Single Replacement
• Combustion
• Decomposition

In a chemical equation, is it true that -

• the reactant side and product side can have different numbers of atoms for each element
• there can be different elements on the reactant side and the product side
• an element or compound must be accompanied by a phase change
• the coefficients indicate the number of molecules of each reactant used and the number of molecules of each product made

Which of these formulas contain equal numbers of nitrogen atoms?

• Formulas I and III
• Formulas I and IV
• Formulas II and III
• Formulas I, II, and V

Two clear colorless solutions were combined.
The student observed that the temperature changed from 25 •C to 23 •C when the solutions were combined and that a white substance rapidly formed and settled to the bottom of the container. What most likely happened to produce these results?

• One of the original compounds came out of solution
• The solutions reacted chemically
• Some of the water froze into ice crystals
• Rapid evaporation of water occurred, leaving a solid

Which of the following BEST describes a chemical reaction?

• A compound is crushed into a fine powder.
• Atoms break apart into even smaller particles.
• Existing electron bonds creak and reattach to other atoms
• Molecules move faster until they fly apart from each other

Which of these is NOT a sign that a chemical change has occurred?

• A loss of transparency

• An unexpected color change

• A temperature change

• The formation of a precipitate