Question
Between $\mathrm{AlF}_3$ and $\mathrm{AlCl}_3$, which one will have a higher melting point?
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Answer
$\mathrm{AlF}_3$ is more ionic, therefore, has higher melting point as compared to $\mathrm{AlCl}_3$ because ' F ' is more electronegative than Cl . Higher the difference in electro-negativity more will be ionic character.
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