Final answer:
The option that is not an example of solid/liquid extraction is purification of ethanol from gasoline (a), because it utilizes distillation, a liquid/liquid separation technique, rather than solid/liquid extraction.
Step-by-step explanation:
The student has asked which option is not an example of a solid/liquid extraction. This question pertains to the separation of compounds based on different phases - solid and liquid. The given examples involve the use of extraction techniques to isolate specific substances from mixtures.
- Purification of ethanol from gasoline involves a separation process, but this is done through distillation, not solid/liquid extraction, as both ethanol and gasoline are liquids.
- Purification of morphine from poppy flowers is a solid/liquid extraction since morphine is extracted from the solid plant material using a liquid solvent.
- Preparation of tea from tea leaves is another example of solid/liquid extraction, where compounds are dissolved from the solid leaves into hot water.
- Isolation of cocaine from coca leaves similarly represents solid/liquid extraction, with compounds being extracted from the solid coca leaves.
- Isolation of menthol can also be a solid/liquid extraction, depending on its source; for instance, if it's from peppermint leaves using a solvent.
Considering the information provided, the option that is not an example of solid/liquid extraction is answer (a) Purification of ethanol from gasoline as it instead involves liquid/liquid separation by distillation based on the different boiling points of the liquids involved.