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Oxidation Reduction

This worksheet covers Oxidation Reduction, which is part of the Chemical Reactions module in the Chemistry course. Practice problems are designed to strengthen key concepts and build confidence.

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Oxidation Reduction

Chemical Reactions • Chemistry

Set 5 — Mastery

In the reaction $Zn + Cu^{2+} \rightarrow Zn^{2+} + Cu$ , which species is reduced?

$Cu^{2+}$

$Zn$

$Zn^{2+}$

$Cu$

Which of the following reactions is an example of oxidation?

$2Na + Cl_{2} \rightarrow 2NaCl$

$H_{2} + O_{2} \rightarrow H_{2}O$

$C + O_{2} \rightarrow CO_{2}$

$Fe^{2+} \rightarrow Fe^{3+} + e^{-}$

In a redox reaction, what happens to the oxidation state of the reducing agent?

It increases.

It decreases.

It remains the same.

It fluctuates.

What is the oxidation state of carbon in $CO_{2}$ ?

-4

In a galvanic cell, which half-reaction occurs at the anode?

Oxidation

Reduction

Neutralization

Hydrolysis

Which of the following elements is a good oxidizing agent?

$Na$

$Cl_{2}$

$Mg$

$Fe$

In the reaction $4Fe + 3O_{2} \rightarrow 2Fe_{2}O_{3}$ , what is the oxidation state of iron in $Fe_{2}O_{3}$ ?

In a redox reaction, what is the role of the oxidizing agent?

It is reduced.

It is oxidized.

It gains neutrons.

It loses protons.

What is the product of the reduction of $Ag^{+}$ ions in a solution?

$Ag$

$Ag_{2}O$

$AgCl$

$Ag_{2}S$

10.

Which half-reaction represents the reduction process?

$A + e^{-} \rightarrow A^{-}$

$A \rightarrow A^{+} + e^{-}$

$A + H^{+} + e^{-} \rightarrow AH$

$A^{+} + e^{-} \rightarrow A$

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