Question
Give reasons:
  1. $SO_2$ is reducing while $TeO_2$ is an oxidizing agent.
  2. Nitrogen does not form pentahalide.
  3. $ICl$ is more reactive than $I_2.$

Answer

  1. Because stability of higher oxidation state decreases as we move down the group/S is more stable in higher $(+6)$ oxidation state whereas Te is more stable in $+4$ oxidation state.
  2. Due to absence of d orbital.
  3. Because $I–Cl$ bond is weaker than I-I bond.

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