Bleaching of paper pulp is done with__________________?
Correct answer: B. Chlorine or chlorine dioxide
- A. Activated clay
- B. Chlorine or chlorine dioxide
- C. Bromine
- D. Magnesium sulphite
Explanation
Pulp bleaching commonly uses chlorine or chlorine dioxide to oxidise and remove residual lignin and colour-producing substances. Activated clay, bromine and magnesium sulphite are not the standard bleaching agents listed here.
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