Question 1

Consider the following reaction: $2PbO(s) \rightarrow 2Pb(s) + O_2(g)$. Which statement correctly describes the oxidation and reduction processes occurring in this reaction?

Accepted Answer

O is oxidized, Pb is reduced

Question 2

In the reaction $2PbO(s) \rightarrow 2Pb(s) + O_2(g)$, what is the oxidation state of Pb in $PbO$ and in $Pb(s)$, respectively?

Accepted Answer

$+2$ in $PbO$, $0$ in $Pb(s)$

Question 3

Which species acts as the reducing agent in the reaction $2PbO(s) \rightarrow 2Pb(s) + O_2(g)$?

Accepted Answer

$PbO(s)$

Question 4

In the decomposition of lead(II) oxide, $2PbO(s) \rightarrow 2Pb(s) + O_2(g)$, which element undergoes oxidation?

Accepted Answer

Oxygen

Question 5

During the reaction $2PbO(s) \rightarrow 2Pb(s) + O_2(g)$, what happens to the oxidation state of oxygen?

Accepted Answer

It increases from $-2$ to $0$

Question 6

Which of the following best describes the type of reaction for $2PbO(s) \rightarrow 2Pb(s) + O_2(g)$?

Accepted Answer

Decomposition and redox

Question 7

If $2.00$ moles of $PbO(s)$ decompose according to $2PbO(s) \rightarrow 2Pb(s) + O_2(g)$, how many moles of $O_2(g)$ are produced?

Accepted Answer

$1.00$ mol

Question 8

Which of the following statements is true regarding the electron transfer in the reaction $2PbO(s) \rightarrow 2Pb(s) + O_2(g)$?

Accepted Answer

Oxygen loses electrons and is oxidized

Question 9

In the reaction $2PbO(s) \rightarrow 2Pb(s) + O_2(g)$, which of the following best describes the change in oxidation state for lead?

Accepted Answer

It decreases from $+2$ to $0$

Question 10

A student claims that both lead and oxygen are reduced in the reaction $2PbO(s) \rightarrow 2Pb(s) + O_2(g)$. Which of the following best evaluates this claim?

Accepted Answer

The claim is incorrect because only lead is reduced; oxygen is oxidized.

Redox Reactions: Identifying Oxidation and Reduction in Chemical Equations

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