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nmdcat.online June 27, 2026

Concerning the structure of triglycerides, a fat that is liquid at room temperature is expected to contain a high proportion of

A. Long, saturated fatty acid chains
B. Short, saturated fatty acid chains
C. Unsaturated fatty acid chains with cis double bonds
✓
D. Trans-fatty acid chains with a linear structure

📝 Explanation

Cis-double bonds in unsaturated fatty acids create kinks that prevent the molecules from packing closely together. This reduces the intermolecular van der Waals forces, resulting in a lower melting point and a liquid state (oil) at room temperature.

📖 Additional Information

  • Long, saturated fatty acid chains
  • Short, saturated fatty acid chains
  • Unsaturated fatty acid chains with cis double bonds
  • Trans-fatty acid chains with a linear structure

Cis-double bonds in unsaturated fatty acids create kinks that prevent the molecules from packing closely together. This reduces the intermolecular van der Waals forces, resulting in a lower melting point and a liquid state (oil) at room temperature.

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