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The compounds below are examples of flavour molecules found in some plants - Scottish Highers Chemistry - Question 14 - 2022
Question 14
The compounds below are examples of flavour molecules found in some plants. Cucumber flavour  Vanilla flavour 
Answer
To determine the solubility of the given compounds in water and oil, we need to consider the structural characteristics of the molecules:
- Polarity and Solubility: Compounds that are polar, usually have functional groups such as -OH (hydroxyl) or -COOH (carboxyl), tend to be soluble in water, while non-polar compounds usually dissolve in oil.
- Analysis of Compounds:
- Cucumber flavour has a non-polar structure, making it more likely to be oil soluble.
- Vanilla flavour, containing a hydroxyl group, is polar and thus water soluble.
- Ginger flavour also has polar characteristics due to hydroxyl groups, indicating it is water soluble.
- Orange flavour, which contains hydroxyl groups, suggests it is also water soluble.
- Conclusion: Based on these characteristics:
- Water soluble: Vanilla, Ginger, and Orange.
- Oil soluble: Cucumber.
Thus, the correct answer is C: ginger and vanilla for water soluble and cucumber and orange for oil soluble.