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NTA Abhyas NEET2020ChemistryChemical Bonding and Molecular StructurePractice

The correct order of increasing covalent character is

Options

  1. ALiCl   <   NaCl   <   BeCl 2
  2. BBeCl 2   <   NaCl   <   LiCl 2
  3. CNaCl   <   LiCl   <   BeCl 2
  4. DBeCl 2   <   LiCl   <   NaCl

Correct answer

C. NaCl   <   LiCl   <   BeCl 2

Step-by-step solution

As per Fajan's rule: (i) Higher the charge on cation/anion, higher will be the covalent nature. (ii) For similar charges, a smaller cation will have more covalent nature. Thus, correct order of covalent nature is: BeCl 2   >   LiCl   >   NaCl

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