Question:

Which of the following has the highest melting point?

Updated On: Jun 8, 2022
  • NaCl
  • NaF
  • NaB
  • NaI
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The Correct Option is B

Solution and Explanation

Lattice energy is directly proportional to the charge of cation and anion whereas inversely proportional to the ion radius (F < Cl < Br < I). NaF due to its largest lattice energy has the highest melting point.
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Concepts Used:

Properties of Solids

Properties of Solids:

  • In solids, particles are tightly or closely packed.
  • Solids are incompressible, meaning the constituent particle is arranged close to each other and because of that, there is negligible space between the constituent particle.
  • Solids are rigid, due to lack of space between the constituent particles which make it rigid or fixed.
  • Solids have definite mass, volume and shape due to which it has a compact arrangement of constituent particles.
  • The intermolecular distance between molecules is short.
  • The rate of diffusion in solids is very low.

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