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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 3 — Foundation

What is the oxidation state of sulfur in $H_{2}SO_{4}$ ?

-2

Which of the following is a reducing agent?

$H_{2}$

$O_{2}$

$Cl_{2}$

$N_{2}$

In the reaction $2Fe + 3Cl_{2} -> 2FeCl_{3}$ , what is being oxidized?

$Fe$

$Cl_{2}$

$FeCl_{3}$

None of the above

What is the reduction half-reaction of the equation $Cu^{2+} + 2e^{-} -> Cu$ ?

$Cu^{2+} + 2e^{-} -> Cu$

$Cu -> Cu^{2+} + 2e^{-}$

$Cu + 2e^{-} -> Cu^{2+}$

$Cu^{2+} -> Cu + 2e^{-}$

In the reaction $Zn + Cu^{2+} -> Zn^{2+} + Cu$ , which metal is oxidized?

$Cu$

$Zn$

$Zn^{2+}$

$Cu^{2+}$

What is the product of the oxidation of $CH_{3}OH$ ?

$H_{2}O$

$CO_{2}$

$CH_{4}$

$C_{2}H_{5}OH$

Which of the following elements is typically reduced?

$Na$

$F_{2}$

$K$

$Li$

Which of the following reactions is an example of a redox reaction?

$C + O_{2} -> CO_{2}$

$H_{2} + Cl_{2} -> 2HCl$

$NaOH + HCl -> NaCl + H_{2}O$

$H_{2}O -> H_{2} + O_{2}$

In which process is iron oxidized?

$Fe + 2Cl -> FeCl_{2}$

$FeO + H_{2} -> Fe + H_{2}O$

$Fe + O_{2} -> Fe_{2}O_{3}$

$Fe + S -> FeS$

10.

What is the oxidation state of nitrogen in $NH_{3}$ ?

-3

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