KF will have higher boiling point.
Boiling point : The boiling point is defined as the temperature at which a liquid's saturated vapour pressure equals the atmospheric pressure surrounding it.
In a solution, KF dissociates into potassium and fluorine ions. That number of particles plays an important role when observing colligative properties of strong electrolytes (such as KF) which dissociate completely but also when observing colligative properties of solutions in general. Since glucose in a non-electrolyte non-volatile which is why we can conclude KF will have a higher boiling point.
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