Question

During paper recycling, .......... is used to bleach pulp.

• A. Bleaching powder
• B. Hydrogen peroxide
• C. Water
• D. None of the above

Answer 1

The correct option is B Hydrogen peroxide

Paper recycling is a process wherein, the paper that is used, discarded by the consumer, is collected and transported to paper mills. The papers are mixed with water and chemicals, broken down, converted into paper pulp and transformed into reusable form. The pulp is colored and bleaching is performed to remove the color. The chemicals which are used for bleaching are hydrogen peroxide, sodium hydrosulfite or sodium dithionite. These chemicals help in deinking of the pulp and increasing brightness.

Thus, the correct answer is option B.