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Most Important Selected Qs for JEE AdvancedChemistrySolid State

LiF and NaBr are ionic salts that both form a face centred cubic lattice. The ionic radii of Li ⁺, F ⁻ , Na ⁺ and Br ⁻ are 0.76,1.33,1.02 and 1.96 ~A ^0 respectively, which of the following statement is / are true

Options

  1. AThe atomic radius of Na is smaller than 1.0 ~A ^0
  2. BThe atomic radius of F is smaller than 1.33 ~A ^0
  3. CEach Li ⁺ ion in LiF has 8 ~F ⁻ ions as nearest neighbors
  4. DThe lattice energy of LiF is greater in magnitude than the lattice energy of NaBr

Correct answer

D. The lattice energy of LiF is greater in magnitude than the lattice energy of NaBr

Step-by-step solution

Radius of cation is smaller than parent atom and that of anion is more than parent atom

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