The lattice energies of NaCl , NaF , KCl and RbCl follow the order

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The lattice energies of $\mathrm{NaCl}, \mathrm{NaF}, \mathrm{KCl}$ and $\mathrm{RbCl}$ follow the order

Chemistrys Block ElementsKVPYKVPY 2017 (19 Nov SA)

Options:

A $K \mathrm{Cl} < \mathrm{RbCl} < \mathrm{NaCl} < \mathrm{NaF}$
B $\mathrm{NaF} < \mathrm{NaCl} < \mathrm{KCl} < \mathrm{RbCl}$
C $\mathrm{RbCl} < \mathrm{KCl} < \mathrm{NaCl} < \mathrm{NaF}$
D $\mathrm{NaCl} < \mathrm{RbCl} < \mathrm{NaF} < \mathrm{KCl}$

Solution:

2303 Upvotes Verified Answer

The correct answer is: $\mathrm{RbCl} < \mathrm{KCl} < \mathrm{NaCl} < \mathrm{NaF}$

$\uparrow \cup \propto \frac{1}{\text { size } \downarrow}$

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