Wood charcoal is applied for sugar decolorization because it _______________ colored impurities?
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Answer: A. Adsorbs
Explanation
Wood charcoal features an extensive porous network that physically adsorbs colored impurities from solutions. Pigments and coloring molecules stick to the internal surface area of the charcoal particles. Adsorption removes these unwanted compounds without chemically altering the purified sugar molecules. Activated and wood charcoals develop high internal surface areas full of microscopic pores. Physical adsorption relies on intermolecular forces attracting solute molecules to solid surfaces. Raw sugar syrups contain dark plant pigments that must be removed during industrial refining.
Sugar refineries use granular or powdered carbon filters to produce sparkling white table sugar. Beverage and food industries employ similar adsorption techniques to decolorize various liquid streams. Effective decolorization ensures high product purity and meets strict commercial aesthetic standards. Oxidation would chemically destroy the sugar molecules rather than simply removing color impurities. Reduction processes would alter the chemical structure instead of adsorbing the unwanted pigments. Converting impurities implies a chemical transformation rather than the physical adsorption taking place.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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