SnCl2 + 2HgCl2 → Hg2Cl2 + SnCl4 in this reaction :

Foundation

Chemistry Foundation

Redox Reactions

Question

SnCl₂ + 2HgCl₂ → Hg₂Cl₂ + SnCl₄ in this reaction :

SnCl₂ is reduced

SnCl₂ is oxidised

Hg₂Cl₂ is oxidised

HgCl₂ is oxidised

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SnCl₂ is gaining Cl which is an electronegative element. Gain of electrongnegative element is oxidation. Thus, SnCl₂ is being oxidised into SnCl₄.