Which of the following aqueous non-electrolyte solution will produce the highest freezing point if 20g of the solute is dissolved in 1000g of water?
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Higher Molar Mass \(\to\) Fewer Particles \(\to\) Less Effect on Colligative Properties (like Freezing Point Depression).
Therefore, for a fixed mass of solute, the "bulkiest" molecule causes the least freezing point drop.