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WorksheetsW2 REDOX REACTION
Total questions: 10
Worksheet time: 5mins
What does the term 'redox' combine?
Reduction and reaction
Oxidation and reduction reaction
Reduction and oxidation
Oxidation and reaction
What happens to the oxidation number during a redox reaction?
It remains the same
It changes for specific elements
It decreases for all elements
It increases for all elements
In a redox reaction, what does oxidation involve?
Gaining electrons
Losing electrons
Combining with oxygen
No change in electrons
What is the oxidation number of an atom in its free state?
Can be positive, negative, or zero
Always zero
Always negative
Always positive
What is an oxidizing agent?
A substance that receives electrons
A substance that donates electrons
A substance that has a negative charge
A substance that has a positive charge
What is a reducing agent?
A substance that donates electrons
A substance that has a positive charge
A substance that has a negative charge
A substance that receives electrons
What is the result of combining oxidation and reduction equations?
Balanced equation
Chemical equation
Molecular equation
Ionic equation
Which of the following is an example of oxidation?
Mg → Mg2+ + 2e-
Fe2+ → Fe3+ + e-
I2 + 2e- → 2I-
Sn4+ + 2e- → Sn2+
Which of the following represents a reduction reaction?
Fe2+ → Fe3+ + e-
I2 + 2e- → 2I-
Mg → Mg2+ + 2e-
Sn4+ + 2e- → Sn2+
What is the main characteristic of a redox reaction?
Only oxidation occurs
Only reduction occurs
Both oxidation and reduction occur
No change in oxidation states
