本题目来源于试卷: Mechanisms of Chemical Change F.2 Electron Transfer Reactions，类别为 IB化学
[单选题]
What is the reducing agznwvg pl7+ff 3fu;- p:ent in tza.sg 3:5 whcthis reaction?
$Zn_{(s)} + 2NO_{3(aq)}^-$ + 4H^+_{(aq)} \rightarrow Zn^{2+}_{(aq)} + 2NO_{2(g)} + 2H_2O_{(I)}$
A. $Zn_{(s)}$
B. $NO_{3(aq)}^-$
C. $Zn^{2+}_{(aq)}$
D. $H^+_{(aq)}$
参考答案: A
本题详细解析:
Reducing agent is a substance that is oxidized.
Oxidation state of l+2o 4wse ni-wZn increases from 0 to +2, whereas the oxidation state of N decreases from +5 to +4.
The oxidation stateio4sw w-+n 2le of H remains +1.
The oxidation state of O remains -2.
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