Chemical Reactions Quiz

Which of the following is always true about a chemical reaction?

• The products are always gases.

• The total mass of reactants equals the total mass of products.

• The temperature always increases.

• The color always changes.

Tags

NGSS.MS-PS1-5

What is the term for substances that are present at the start of a chemical reaction?

• Products

• Reactants

• Catalysts

• Solvents

Tags

NGSS.MS-PS1-1

• Decomposition

• Synthesis

• Single displacement

• Combustion

Tags

NGSS.MS-PS1-2

What do you call a reaction that absorbs energy from its surroundings?

• Exothermic

• Endothermic

• Neutral

• Spontaneous

Tags

NGSS.HS-PS1-4

Which of the following is NOT a sign of a chemical reaction?

• Change in state of matter

• Change in color

• New solid formed

• Gas formed

Tags

NGSS.MS-PS1-2

Tags

NGSS.MS-PS1-5

Which factor will NOT increase the rate of a chemical reaction?

• Increasing temperature

• Increasing concentration of reactants

• Adding an inhibitor

• Adding a catalyst

Tags

NGSS.HS-PS1-5

Which of the following best describes an exothermic reaction?

• It absorbs heat and feels cold.

• It releases heat and feels warm.

• It does not change temperature.

• It only occurs in plants.

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

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

If you increase the concentration of reactants in a reaction, what is most likely to happen to the rate of reaction?

• It will decrease.

• It will stay the same.

• It will increase.

• It will stop completely.

Tags

NGSS.HS-PS1-5