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Question
Identify the correct statement (s) in relation to the following reaction:
\[\ce{Zn + 2HCl -> ZnCl2 + H2}\]
(i) Zinc is acting as an oxidant.
(ii) Chlorine is acting as a reductant.
(iii) Hydrogen ion is acting as an oxidant.
(iv) Zinc is acting as a reductant.
Solution
(iii) Hydrogen ion is acting as an oxidant.
(iv) Zinc is acting as a reductant.
Explanation:
The given equation is as-
\[\ce{Zn + 2HCl -> ZnCl2 + H2}\]
In this \[\ce{Zn}\] has a negative EΘ value, which means it will undergo oxidation and will act as a reducing agent (reductant). \[\ce{Zn}\] can produce \[\ce{H2}\] gas with \[\ce{HCl}\], as hydrogen has higher standard reduction potential than \[\ce{Zn}\], hydrogen will undergo reduction and will act as oxidant.
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