| Date | November 2012 | Marks available | 2 | Reference code | 12N.3.sl.TZ0.F1 |
| Level | SL | Paper | 3 | Time zone | TZ0 |
| Command term | Identify | Question number | F1 | Adapted from | N/A |
Question
Fats are complex molecules derived from fatty acids and glycerol. They are an important part of our diet and have many functions in the body including energy storage.
Identify the main functional group present in
(i) all fats.
(ii) all fatty acids.
Markscheme
(i) ester;
(ii) carboxylic acid / carboxyl;
Accept alkanoic acid.
Accept formulas.
Examiners report
In (a) the ester in fats was less well known than the carboxylic acid in fatty acids.
Syllabus sections
Show 106 related questions
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- 11N.3.sl.TZ0.F2a: State the meaning of the term rancidity as it applies to fats.
- 11N.3.sl.TZ0.F2b.i: Compare the two rancidity processes. Hydrolytic process: Oxidative process:
