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Question: Answered & Verified by Expert
Based on lattice energy and other considerations which one of the following alkali metal chlorides is expected to have the highest melting point.
Chemistrys Block ElementsJEE MainJEE Main 2005
Options:
  • A
    LiCl
  • B
    NaCl
  • C
    KCl
  • D
    RbCl
Solution:
2029 Upvotes Verified Answer
The correct answer is:
NaCl
Although lattice energy of LiCl higher than NaCl but LiCl is covalent in nature and NaCl ionic there after , the melting point decreases as we move NaCl because the lattice energy decreases as a size of alkali metal atom increases (lattice energy ∝ to melting point of alkali metal halide)

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