Which among the following is correct decreasing order of covalent character of ionic bond?

Which among the following is correct decreasing order of covalent character of ionic bond?
  1. $\mathrm{AlCl}_3>\mathrm{MgCl}_2>\mathrm{NaCl}$
  2. $\mathrm{AlCl}_3>\mathrm{NaCl}>\mathrm{MgCl}_2$
  3. $\mathrm{MgCl}_2>\mathrm{MgCl}_2>\mathrm{AlCl}_3$
  4. $\mathrm{NaCl}>\mathrm{MgCl}_2>\mathrm{AlCl}_3$

Solution

More is the change on cation greater is polarising power and more is the covalent character order of polarizing power $\mathrm{Al}^{+3}>\mathrm{Mg}^{+2}>\mathrm{Na}^{+}$

Asked in: MHT CET 2022 (05 Aug Shift 1)

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