(Polar molecules, Non-polar molecules, etc.)
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You simply need to relate bond strength to melting point. For example, a molecule involved in hydrogen bonding would have a higher melting point than one with merely dispersion forces because hydrogen bonds are stronger than London dispersion forces.
You should probably know which types of bonds are stronger than others, because the stronger the bond, the higher the melting/boiling point. For example, ion-ion being the strongest bond and induced dipole-induced dipole being the weakest.
It might be helpful to know the order of strength for intermolecular forces so that you can determine which molecules will have higher or lower melting points based on their bonds. I don't think we are expected to have memorized melting points of specific molecules.
You would just be asked to predict the melting point, nothing exact but more on the lines of high and low, or perhaps comparing two molecules and predicting which one would have a higher or lower melting point due to the bonds they have.
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