Final answer:
Option a, the purification of ethanol from gasoline, is not an example of solid/liquid extraction because ethanol and gasoline are both liquids and their separation is usually achieved through distillation rather than extraction. option a is correct
Step-by-step explanation:
option a is correct The student's question pertains to identifying which option is not an example of a solid/liquid extraction. Solid/liquid extraction involves separating components based on their solubilities in a particular solvent. In each of the options provided, a compound is being separated from its mixture with another phase. For options b, c, d, and e, extraction involves separating a substance (morphine, tea, cocaine, and menthol respectively) from a solid mixture using a solvent. However, option a, the purification of ethanol from gasoline, does not fit this description as gasoline is a liquid mixture, and separation of ethanol would typically involve a different technique like distillation, which separates substances based on differences in their boiling points.
b. Purification of morphine from poppy flowers is not an example of a solid/liquid extraction. Solid/liquid extraction is a process that involves the separation of a solid compound from a liquid mixture by dissolving the solid in a suitable solvent. In the case of purifying morphine from poppy flowers, a more complex process called alkaloid extraction is used, which involves several steps like maceration, filtration, and evaporation.