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:secure I nt ps.ll ses: 'on.'" s e..ng Blankets fit for a kin Bedding | Beds in So.. t? Types of Bed Sheet.... ps f Facebook Pretest tem 3 Part A Which of the following statements concerning unsaturated fats is correct? O They are more common in animals They have no double bonds in the carbon chains of their fatty acids 0 they are generally liquids at room temperature O They contain more hydrogen than do saturated fats having the same number of carbon atoms they have fewer fatty acids per fat molecule than do saturated fats Submit Provide Feedback MacBook A esc

Explanation / Answer

Unsaturated fatty have one or more double bonds between their carbon atoms. These double bonds can be converted to single bonds by addition of more hydrogen atom. Addition of hydrogen to double bonds will convert them to saturated fatty acids. Hence, saturated fatty acids have more hydrogen than unsaturated fatty acids with same number of carbon atoms.

Double bonds in unsaturated fatty acids will lead to kinks. Hence, these fats with one or more unsaturated fatty acids cannot pack tightly. These kinks keep the fats with unsaturated fatty acids as liquids at room temperature.

Part A

Unsaturated fatty acids are more common in plants while saturated fatty acids are more common in animals. Plants produce oils with unsaturated fatty acids (liquids).

Fats or triglycerides are esters of three fatty acids and alcohol glycerol. The only difference between saturated and unsaturated fats is the number of double bonds in fatty acids. There is no difference in number of fatty acids per fat molecule.

Hence, option is that they are liquids at room temperature.

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