- (D) Only II and III are redox reactions. The first reaction is a precipitation
reaction. PbS is the precipitate, and the oxidation states of the substances in
the reaction are not changing. The second equation is a combustion reaction.
The oxidation states of carbon and oxygen change from −4 to +4 and 0 to −2,
respectively. The third reaction is a synthesis reaction. The oxidation states of
hydrogen and oxygen change from 0 to +1 and 0 to −2, respectively.
marvins-underground-k-12
(Marvins-Underground-K-12)
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