Lesson Worksheet: Oxidization and Reduction Science
In this worksheet, we will practice identifying, and analyzing oxidization and reduction reactions.
Q1:
What is the chemical process that involves an atom gaining one or more electrons known as?
- ASubstitution
- BCombustion
- COxidization
- DReduction
- ENeutralization
Q2:
Consider the reaction between sodium and chlorine:
Which chemical species is oxidized in the reaction?
- AThe sodium atoms
- BThe sodium ions
- CThe chlorine atoms
- DThe chlorine ions
Q3:
What is the name of the chemical process in which the percentage of oxygen in a substance increases?
- AReduction
- BNeutralization
- CCombustion
- DSubstitution
- EOxidization
Q4:
Fill in the blank: If, during the course of a chemical reaction, there is an increase in the percentage of hydrogen in a substance, then that substance is said to have been .
- Aoxidized
- Breduced
- Cprecipitated
- Dextracted
- Eneutralized
Q5:
Which of the following descriptions can be used for an oxidizing agent?
- A1, 2, and 5
- B1, 3, and 4
- C2 and 5
- D2, 3, and 4
- E1 and 5
Q6:
Which of the following statements about oxidization and reduction is correct?
- AOxidization can happen independently of reduction.
- BReduction happens before oxidization.
- COxidization happens before reduction.
- DOxidization and reduction happen concurrently.
Q7:
Which of the following diagrams shows a chloride ion formed when an atom of chlorine is reduced?
- A
- B
- C
- D
- E
Q8:
Consider the reaction of sodium with chlorine:
Which of the following particle diagrams correctly shows what happens to the sodium atoms in this reaction?
- A
- B
- C
- D
- E
Q9:
Consider the following equation:
Simple substitution reactions, where a more active metal replaces another, involve oxidization and reduction. In the equation, magnesium displaces copper. Which of the following statements correctly explains the oxidization and reduction occurring in this reaction?
- AThe copper ions lose electrons.
- BMagnesium is acting as an oxidizing agent.
- CThe copper ions turning into copper atoms is oxidation.
- DThe magnesium atoms turning into magnesium ions is oxidation.
- EThe magnesium atoms turning into magnesium ions is reduction.
Q10:
A teacher demonstrates the reduction of copper(II) oxide to students in a class using 2.0 g of .
After the experiment is finished, the teacher reweighs the chemicals in the reduction tube.
What is the mass of the solid chemicals?
- AThe same, 2.0 g
- BLess than 2.0 g
- CMore than 2.0 g
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