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Chemical Reactions Quiz: Spotting Changes and Signs of a Reaction!

Last updated 3 months ago

16 questions

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Question 16

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Which of the following is a sign that a chemical reaction has occurred?

Color change

Ice melting

Dissolving sugar

Breaking a glass

What happens to the chemical bonds during a chemical change?

They break and form new ones

They stay the same

They only break

They only form

A physical change is always reversible.

True

False

Which of the following is an example of a physical change?

Burning wood

Rust forming on metal

Melting ice

Baking a cake

Select all the signs of a chemical reaction.

Gas produced

Heat released

Shape change

Color change

Which statement is true about chemical changes?

They can usually be undone easily

They result in new substances

They only involve physical properties

They do not involve energy changes

Dissolving salt in water is a chemical change.

True

False

What is it called when a solid forms from a liquid during a chemical reaction?

Precipitate

Evaporation

Filtration

Oxidation

Which processes are examples of chemical changes?

Photosynthesis

Chopping wood

Burning paper

Melting chocolate

What is one common sign of a chemical reaction involving gases?

Fizzing or bubbling

Color change

Change in size

Change in state

All physical changes result in the formation of new substances.

True

False

What typically does not indicate a chemical change?

Formation of gas

Color change

Liquid freezing

Temperature change

Select the processes that showcase signs of chemical reactions.

Rust forming

Ice melting

Milk souring

Food cooking

During a chemical reaction, what happens to energy?

It is always absorbed

It is always released

It may be absorbed or released

It remains constant

Baking soda reacting with vinegar is an example of a physical change.

True

False

Which of these can indicate a chemical change? Select all that apply.

Change in color

New odor

Change in shape

Change in temperature