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Hydrobenzoin is more polar than benzil.
Benzil has a symmetrical structure with two carbonyl groups (C=O) which are polar but cancel each other out due to the symmetry. Hydrobenzoin, on the other hand, has two hydroxyl groups (OH) which are highly polar and contribute to the overall polarity of the molecule. The presence of these polar hydroxyl groups in hydrobenzoin makes it more polar than benzil.