HUMAN NUTRITION

Detailed explanation-1: -Oils are liquids at room temperature due to the presence of higher percentage of oleates present in the oils which are unsaturated fatty acids and if higher unsaturation is present melting point will be lower.

Detailed explanation-2: -The building blocks of unsaturated fats have bends or kinks that don’t allow the blocks to be tightly stacked and thus, appear more fluid and are liquid at room temperature.

Detailed explanation-3: -oil, any greasy substance that is liquid at room temperature and insoluble in water. It may be fixed, or nonvolatile, oil; essential oil; or mineral oil (see petroleum). A brief treatment of fixed oils follows.

Detailed explanation-4: -Complete answer: Kerosene has very low vapour pressure and is volatile and evaporates at room temperature (liquid to gas) .