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NTA Abhyas JEE Main2020ChemistryGeneral Principles and Processes of Isolation of MetalsPractice

CaO and NaCl have the same crystal structure and nearly the same ionic radii. If 'u' is the lattice energy of NaCl, the lattice energy of CaO is very nearly

Options

  1. A4u
  2. B2u
  3. Cu
  4. Du/2

Correct answer

A. 4u

Step-by-step solution

Lattice energy ∝ Product of charges on ions Interionic distance In CaO, the charges on cation and anion are twice the magnitude of charges on the cation and anion of NaCl. The interionic distance is the same.

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