Chemical Reactions: Multiple Choice Practice

Which of the following shows signs of a chemical reaction?

• a. a colorless liquid and a gray solid are mixed to produce a gas and a green liquid.
• b. liquid water is boiled to produce steam.
• c. large brown rocks are ground into smaller pieces to produce a brown powder.
• d. water is added to a dark blue liquid to produce a light blue liquid.

Tags

NGSS.MS-PS1-2

A student pours two different liquids into a glass beaker. Which of the following would indicate that a chemical reaction occurred between the two liquids?

• a. an increase in total mass of the liquids.
• b. a decrease in total volume of the liquids.
• c. the formation of a solid in the beaker.
• d. the complete mixing of the two liquids.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is an example of a chemical process?

• a. cutting a piece of wood into small wood chips
• b. burning a marshmallow
• c. dissolving table salt in a glass of water
• d. boiling water turning into steam

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following statements is correct

• a. In a chemical reaction, the total mass of the products is more than the total mass of the reactants.
• b. In a chemical reaction, the total mass of the products is less than the total mass of the reactants.
• c. In a chemical reaction, the total mass of the products is equal to the total mass of the reactants.
• d. In a chemical reaction, the total mass of the products is unrelated to the total mass of the reactants.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A closed system is one in which:

• a. reactants can enter or leave, but products cannot.

• b. reactants cannot enter or leave, but products can.

• c. reactants and products can both enter or leave.

• d. reactants and products cannot enter or leave.

A reaction occurs between two liquids. Before the reaction, liquid A is clear and colorless. Liquid B clear and light blue in color. When the two liquids are combined in a closed system, a cloudy, pale green solution is formed. Which of the following describes what has occurred?

• a. a chemical reaction where mass was conserved
• b. a physical reaction where mass was conserved
• c. a chemical reaction where mass was not conserved
• d. a physical reaction where mass was not conserved

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is an example of using a chemical process to release energy?

• a. cutting wood into small wood chips
• b. dissolving copper chloride powder in a beaker of water
• c. using a battery to power a flashlight
• d. heating an ice cube to melt it

When an endothermic chemical reaction absorbs thermal energy from the environment,

• a. there is no change in temperature, but there is a change in state.
• b. the temperature of the products is higher than the temperature of the reactants.
• c. the temperature of the products is lower than the temperature of the reactants.
• d. the temperature of the products is the same as the temperature of the reactants.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Your friend Mary tells you she has a great idea for making a new product to keep the wires from her headphones from tangling. She makes a version of her product from materials she finds at home. This first version of her product is known as

• a. an experiment.
• b. a prototype.
• c. a constraint.
• d. a criterion.

Tags

NGSS.MS-ETS1-4

Your friend Mary asks you to try out the product she has made for storing headphones and give her feedback on it. You use it for five days, keep track of how well it works, and tell her what worked and what did not work. Then Mary makes another version of the product. Which part of the design process did you help with?

• a. identifying the problem
• b. designing the product
• c. building the product
• d. testing and evaluating the product

Tags

NGSS.MS-ETS1-3