12 Worksheets on Chemical Reactions & Chemical equations – MCQ | Multiple Choice Questions – chemistry

Last updated on June 12th, 2021 at 01:53 pm

In this post, we present 12 worksheets (with answers) on Chemical Reactions, chemical equations, and Chemical Energy. These sets include MCQ worksheets (with answers) and other types of exercises like filling the blanks and matching worksheets.

Chemical Reactions – MCQ Worksheet (with answer) – set 1

1. What do the formation of rust and the formation of cottage cheese have in common?
   a. Both occur very quickly.
   b. Both involve chemical reactions.
   c. Both are changes of state.
   d. Both are physical processes.
   
2. Which of the following changes does not involve chemical reactions?
   a. clouds forming
   b. candles burning
   c. leaves turning color
   d. fire extinguishers foaming
   
3. During chemical reactions, atoms are
   a. rearranged.
   b. created or destroyed.
   c. changed to new elements.
   d. two of the above
   
4. There is no overall change in reactants and products whenever a chemical reaction
   a. goes in just one direction.
   b. goes in two directions.
   c. reaches equilibrium.
   d. proceeds slowly.
   
5. Evidence of chemical reactions include changes in
   a. state.
   b. color.
   c. temperature.
   d. two of the above
   
6. What does the following equation represent? Reactants<->Products
   (a) any chemical reaction
   (b) a reversible chemical reaction
   (c) a chemical reaction in equilibrium
   (d) all of the above

Answers to MCQ Worksheet

Multiple Choice

1. b
2. a
3. a
4. c
5. d
6. b

Chemical Reactions – Matching worksheet (Match the definition with a term) – set 2

Matching Assignment:
Match each definition with the correct term.

Definitions

1. substance produced in a chemical reaction
2. force of attraction that breaks and reforms in a chemical reaction
3. substance that starts a chemical reaction
4. example of chemical change
5. balance between opposing changes
6. process in which some substances become different substances
7. example of a physical change

Terms

a. chemical reaction
b. melting
c. equilibrium
d. chemical bond
e. product
f. rusting
g. reactant

Answer – Matching Assignment

Matching

1. e
2. d
3. g
4. f
5. c
6. a
7. b

Chemical Reactions – Fill in the Blanks worksheet – set 3

Fill in the Blank: Fill in the blank with the appropriate term.

1. In chemical reactions, bonds __ in reactants.
2. The point at which forward and reverse reactions occur at the same rate is called __.
3. A change in color may be evidence that a(n) __ has occurred.
4. New bonds form in __ of chemical reactions.
5. The direction in which a chemical reaction occurs is represented by a(n) __.
6. Products and reactants contain the same __ but in different combinations.
7. A(n) __ is a solid that settles out of a liquid solution in a chemical reaction.

Answer – Fill in the Blank (answers)

Fill in the Blank – answers

1. break
2. equilibrium
3. chemical reaction
4. products
5. arrow
6. atoms
7. precipitate

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