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Chemical Reactions Quiz: Spotting Changes and Signs of a Reaction!
By Mr Pike
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Last updated about 11 hours ago
16 questions
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Question 1
1.
Which of the following is a sign that a chemical reaction has occurred?
Color change
Ice melting
Dissolving sugar
Breaking a glass
Question 2
2.
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
Question 3
3.
A physical change is always reversible.
True
False
Question 4
4.
Which of the following is an example of a physical change?
Burning wood
Rust forming on metal
Melting ice
Baking a cake
Question 5
5.
Select all the signs of a chemical reaction.
Gas produced
Heat released
Shape change
Color change
Question 6
6.
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
Question 7
7.
Dissolving salt in water is a chemical change.
True
False
Question 8
8.
What is it called when a solid forms from a liquid during a chemical reaction?
Precipitate
Evaporation
Filtration
Oxidation
Question 9
9.
Which processes are examples of chemical changes?
Photosynthesis
Chopping wood
Burning paper
Melting chocolate
Question 10
10.
What is one common sign of a chemical reaction involving gases?
Fizzing or bubbling
Color change
Change in size
Change in state
Question 11
11.
All physical changes result in the formation of new substances.
True
False
Question 12
12.
What typically does not indicate a chemical change?
Formation of gas
Color change
Liquid freezing
Temperature change
Question 13
13.
Select the processes that showcase signs of chemical reactions.
Rust forming
Ice melting
Milk souring
Food cooking
Question 14
14.
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
Question 15
15.
Baking soda reacting with vinegar is an example of a physical change.
True
False
Question 16
16.
Which of these can indicate a chemical change? Select all that apply.
Change in color
New odor
Change in shape
Change in temperature