(i) Zinc is undergoing oxidation in the above reaction so statement one is wrong
(ii) Chlorine does not have any change in oxidation number since in HCl and ZnCl2 the ON is -1
(iii) Hydrogen has reduced itself from +1 to 0, thus acting as an oxidising agent, i.e. oxidant
(iv) Zinc underwent oxidation from ON of 0 to +2, implying it being a reducing agent i.e. reductant.
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