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NEET2007Chemistrys Block ElementsActual

The correct sequence of increasing covalent character is represented by

Options

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

Correct answer

C. NaCl LiCl BeCl ₂

Step-by-step solution

On the basis of Fajan's rule, lower the size of cation higher will be its polarising power and higher will be covalent character. Polarising power 1 size of cation Covalent character Polarising power So the correct order is NaCl LiCl BeCl ₂ (The order of size of cation Na ⁺ Li ⁺ Be ²⁺ )

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