Directions : Read the given passage and answer the questions that follow.
The extraction of indigo dye involves harvesting the small, green leaves of the Indigofera plant before its flowers bloom. These leaves undergo a process of soaking in water and churning until a navy-blue froth is release4. The upper portion of the resulting mixture is drained for irrigation, while the leaves are repurposed as fertilizer. After allowing the water and fine sediment to settle for a day, the liquid is separated from the sediment. The obtained deep blue paste is then subjected to filtration to remove dirt and impurities, followed by compression into cakes and drying for several days. Once dried, the indigo is ready for use as a dye. Lime (Ca(OH)₂) can be added to the initial water and leaves mixture, and various natural sugars can be dissolved into the paste to enhance the extraction process.
In the extraction process described, what is the purpose of allowing the water and fine sediment at the bottom of the tank to settle for a day?
1.To enhance the aroma of the indigo dye
2.To facilitate the separation of liquid from sediment
3.To create a unique texture in the final indigo paste
4.To promote the growth of additional indigo leaves
Correct Answer : 2
Solution :
As per the following excerpt from the passage, "After allowing the water and fine sediment to settle for a day, the liquid is separated from the sediment," it can be noted that settling allows the liquid to separate from the sediment, enabling the collection of the deep blue paste, as described in the process.
Hence, the correct answer is option (2).
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