Gce Model Questions Vol1 2019 Chemistry Question 24
Practice objective / multiple choice question 24 from the 2019 Gce Model Questions Vol1 Chemistry examination.
Using the ionic radii (pm): \(\mathrm{Na^+}=102\), \(\mathrm{F^-}=133\), \(\mathrm{Cl^-}=181\), \(\mathrm{I^-}=206\), estimate the relative lattice energies of the ionic compounds \(\mathrm{NaF}\), \(\mathrm{NaCl}\) and \(\mathrm{NaI}\) by assuming lattice energy is proportional to \(\frac{1}{r_{+}+r_{-}}\). Rank the compounds from highest to lowest lattice energy, and, applying Fajans' rules, indicate which compound is expected to exhibit the greatest covalent character.
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This is Gce Model Questions Vol1 2019 Chemistry Question 24. It is one of the objective questions from the 2019 Gce Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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