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AP EAMCET202123 Aug 2021Evening ShiftChemistryChemical Bonding and Molecular StructureActual

AlCl ₃ is an electron deficient compound but AlF ₃ is not. This is because

Options

  1. Aatomic size of F is smaller than Cl which makes AlF ₃ more covalent
  2. BAlCl ₃ is a covalent compound while AlF ₃ is an ionic compound
  3. CAlCl ₃ exists as dimer but AlF ₃ does not
  4. DAl in AlCl ₃ is in s p^3 hybrid state but Al in AlF ₃ is in s p^2 hybrid state

Correct answer

B. AlCl ₃ is a covalent compound while AlF ₃ is an ionic compound

Step-by-step solution

According to Fajan's rule, larger is the size of anion, more is the covalent character. So, AlCl ₃ is a covalent, while AlF ₃ is ionic, so AlCl ₃ is electron deficient but AlF ₃ is not.

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