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Question: Answered & Verified by Expert
Assertion (A) Covalent character follows $\mathrm{NaCl} < \mathrm{MgCl}_2 < \mathrm{BeCl}_2 < \mathrm{LiCl}$.
Reason (R) According to Fajan's rules, covalent character of ionic compounds increases with decrease in size of cation.
ChemistryChemical Bonding and Molecular StructureAP EAMCETAP EAMCET 2021 (23 Aug Shift 2)
Options:
  • A Both $A$ and $R$ are true and $R$ is a correct explanation for $A$.
  • B Both $A$ and $R$ are true but $R$ is not a correct explanation for $\mathrm{A}$.
  • C $A$ is true but $R$ is false.
  • D $A$ is false but $R$ is true.
Solution:
1266 Upvotes Verified Answer
The correct answer is: $A$ is false but $R$ is true.
The correct order of covalent character is $\mathrm{NaCl} < \mathrm{LiCl} < \mathrm{MgCl}_2 < \mathrm{BeCl}_2$. The covalent character depends on small size as well as more + ve charge on cation.

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