For extraction, there should be an option c) lower solute solubility in the second phase.
Extraction is a process in which a solute is separated from a solution or mixture by two immiscible liquid phases. It involves two phases in which the solute has different solubilities.
In the first phase, the solute has higher solubility, meaning it dissolves more readily.
In the second phase, the solute has lower solubility, meaning it is less likely to dissolve.
In order for extraction to be successful, the solute must be differently soluble in the phases. This ensures that the solute is separated efficiently and effectively.
The process of extraction involves the formation of two liquid phases and the transfer of the solute from one phase to the other. The solute is transferred from the first phase to the second phase, where it is separated from the solution.
To summarize, extraction is a process of separating a solute from a solution or mixture by two immiscible liquid phases. It involves two phases in which the solute has different solubilities.
Therefore, for extraction, it is necessary for the solute to have a lower solubility in the second phase. and hence the correct answer is option c.
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