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Question: Answered & Verified by Expert
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
ChemistryGeneral Principles and Processes of Isolation of MetalsJEE Main
Options:
  • A 4u
  • B 2u
  • C u
  • D u/2
Solution:
2094 Upvotes Verified Answer
The correct answer is: 4u
Lattice energy Product of charges on ionsInterionic 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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