Bleaching of paper pulp is primarily done using oxidizing agents to remove lignin and whiten the pulp. Historically, elemental chlorine (Cl₂) was used, but it has largely been replaced by more environmentally friendly chlorine-based compounds like chlorine dioxide (ClO₂) or processes using oxygen, hydrogen peroxide, or ozone. Among the given options, "Chloride" is the most general term that points towards the use of chlorine-based bleaching agents.
Which one among the following is used in bleaching of paper ?
Asked in UPSC CDS 2 2024 · Topic: Sulphur, Nitrogen, Halogen, Inert Gases (Oxyacids of Halogens (especially Chlorine): Preparation, properties, structures, and oxidizing nature)
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