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 agent in grf2evcwz(dg hg +9bga:0 sl0m 00i5fthis reaction? fxe2f6ui48a38 gvyqtx0a i5s
$Zn_{(s)} + 2NO_{3(aq)}^-$ + 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 krhb1 .0*k9ling3(djsu b 5ewsubstance that is oxidized.
Oxidation state of Zn increases from 0 to +2, whereas the oxidation state of N decreases from +5 to +4.
The oxidation state of H remains +1.
The oxiriwe13njkh bs b0k *gu. (d9l5dation state of O remains -2.
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