Question

The table below gives the percent (%) fatty acid composition of 3 lipids (identified as 1, 2, and 3). Which of the following statements is true regarding the physical state of these lipids?

Lipid	Palmitic (16:0)	Stearic (18:0)	Oleic (18:1d-9)	Linoleic (18:2d-9, 12)
1	32.4	20.8	10.2	14.8
2	11.3	9.8	44.8	22.6
3	23.9	28.2	16.4	15.7

		Lipids 1 and 3 are classified as fats, whereas lipid 2 is classified as an oil.
		Lipid 2 is classified as a fat, whereas lipids 1 and 3 are classified as oils.
		Lipids 1, 2, and 3 are classified as fats.
		Lipids 2 and 3 are classified as fats, whereas lipids 1 is classified as an oil.

Answer 1

1st option

Palmitic acid, stearic acid - saturated fatty acids - fats

Oleic acid, linoleic acid - unsaturated fatty acids - oils

First option is correct because second lipid is having more amount of unsaturated fatty acids as compared to saturated fatty acids. So this will be a fat.

First and third lipids are having more amount of saturated fatty acids as compared to unsaturated ones. So they will be oils.

Saturated fatty acids are straight chain molecules and can easily pack with one another. Because of this they form compact arrangements called as fat. They are solid at room temperature.

Unsaturated fatty acids have a double bond in them due to which they have a bended appearance. Because of this day cannot pack tightly with each other and have loose arrangement called as oil. These are liquid at room temperature.

Please ratee high.