The combination of which of the following gives an ionic compound with maximum covalent character.

The combination of which of the following gives an ionic compound with maximum covalent character.
  1. $\mathrm{Mg}^{2+}$ and $\mathrm{Cl}^{-}$
  2. $\mathrm{Mg}^{2+}$ and $\mathrm{O}^{2-}$
  3. $\mathrm{Na}^{+}$and $\mathrm{Br}^{-1}$
  4. $\mathrm{Na}^{+}$and $\mathrm{O}^{2-}$

Solution

According to the Fajan's rule, smaller the size of cation and larger size anion have greater covalent character.

Asked in: AP EAMCET 2022 (05 Jul Shift 2)

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