In 2FeCl₃ + SnCl₂ → 2FeCl₂ + SnCl₄, the valency of tin changes from:

University of Ilorin CHM107 2026 past question

  1. +2 → +4
  2. +1 → +2
  3. +3 → +2
  4. +4 → +2

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