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← ScienceWhich mechanism causes increased viscosity in motor oil at low temperatures?
A)Van der Waals intermolecular attraction✓
B)Increased ionic conductivity
C)Phase transition to solid
D)Reduced hydrogen bond formations
💡 Explanation
Reduced kinetic energy allows the Van der Waals intermolecular attraction mechanism to dominate between oil molecules, increasing viscosity when they move closer; therefore, the oil thickens rather than remaining fluid due to rapid molecular motion at higher temperatures.
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