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

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

Chemical Equations – MCQ Worksheet (with answer) – set 4

1. A shorthand way of showing how atoms are rearranged in a chemical reaction is a chemical
   a. symbol.
   b. formula.
   c. equation.
   d. letter.
   
2. When there is more than one reactant in a chemical equation, they are separated by
   a. arrows.
   b. subscripts.
   c. plus signs.
   d. coefficients.
   
3. In the reaction represented by the chemical equation 2Cu + O₂ -> 2CuO, new bonds are formed in
   a. 2Cu.
   b. O₂.
   c. CuO.
   d. none of the above
   
4. Chemical equations must be balanced because matter cannot be
   a. created.
   b. destroyed.
   c. changed.
   d. two of the above
   
5. Which chemical equation is balanced?
   a. 2Na + Cl₂ ->2NaCl
   b. Na + 2Cl₂ ->2NaCl
   c. 2Na + 2Cl₂ -> 2NaCl
   d. Na +Cl₂ ->NaCl
   
6. What is the missing coefficient in the following chemical equation? ?NO + O₂ ->2NO₂?
   a. 0
   b. 1
   c. 2
   d. 4
   

Answers to MCQ Worksheet

Multiple Choice answers

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

Chemical Equations – Matching worksheet (Match the definition with a term) – set 5

Matching Assignment:
Match each definition with the correct term.

Definitions
1. symbolic representation of a chemical reaction
2. example of a coefficient
3. symbol of a chemical compound
4. example of a subscript
5. number showing how many atoms or molecules of a given element or compound are involved in a chemical
equation
6. symbol of an chemical element
7. number showing how many atoms of a given element are in a molecule

Terms
a. chemical symbol
b. coefficient
c. H₂
d. chemical equation
e. 2H
f. subscript
g. chemical formula

Answer – Matching Assignment

Matching

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

Chemical Equations – Fill in the Blanks worksheet – set 6

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

1. In the chemical equation C + O₂ -> CO₂, the product is __.
2. To balance the chemical equation 2H₂ + O₂ -> H₂O, water needs a coefficient of __.
3. According to the law of __, matter cannot be created or destroyed.
4. __ did experiments that demonstrated the law in question 3.
5. When you balance a chemical equation, you should change only the __.
6. Balanced equations show that __ is conserved in chemical reactions.
7. The scientist called the father of modern chemistry is __.

Answer – Fill in the Blank (answers)

Fill in the Blank

1. CO₂
2. 2
3. conservation of mass
4. Lavoisier
5. coefficients
6. mass
7. Lavoisier

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