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Identify the redox reactions out of the following reactions and identify the oxidising and reducing agents in them.

(i) 3HCl(aq) + HNO3 (aq) → Cl2 (g) + NOCl (g) + 2H2O (l )

(ii) HgCl2 (aq) + 2KI (aq) → HgI2 (s) + 2KCl (aq)

(iii) Fe2O3 (s) + 3CO (g) +Δ→ 2Fe (s) + 3CO2 (g)

(iv) PCl3 (l) + 3H2O (l) → 3HCl (aq) + H3 PO3 (aq)

(v) 4NH3 + 3O2 (g) → 2N2 (g) + 6H2O (g)

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(i) Writing the O.N. of on each atom,

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