Coconut oil, a saturated fat, solidifies at 25°C, while corn oil, a polyunsaturated fat, remains liquid at room temperature. Explain the reason for this difference in the physical states at room temperature.

• A. The physical state of these oils at room temperature is determined by the presence or absence of ketone groups in their fatty acid chains, which affects how they form hydrogen bonds and, consequently, their melting points.
• B. The physical state of these oils at room temperature is determined by the presence or absence of double bonds in their fatty acid chains, which affects how closely the molecules can pack together and, consequently, their melting points.
• C. The physical state of these oils at room temperature is determined by the presence or absence of triple and double bonds in their fatty acid chains, which affects how closely the molecules can pack together and, consequently, their melting points.
• D. The physical state of these oils at room temperature is determined by the presence or absence of hydrogen bonding in their fatty acid chains, which affects how closely the molecules can pack together and, consequently, their melting points.

Answer: (B)