Question

To manufacture paper from ______(i) _______, the ________ (ii) _______ must be freed from the binding matrix of ________(iii) ________ in the pulping step. Which one of the following is the CORRECT option to fill in the gaps (i), (ii) and (iii)?

• A. (i) wood, (ii) cellulose fibers, (iii) lignin
• B. (i) lignin, (ii) cellulose fibers, (iii) wood
• C. (i) lignin, (ii) wood, (iii) cellulose fibers
• D. (i) wood, (ii) lignin, (iii) cellulose fibers

Hint:

Lignin removal is crucial as it not only allows the extraction of cellulose but also prevents the paper from yellowing and becoming brittle over time.

Answer 1

The Correct Option is A

Step 1: Identify the raw material.
Paper is primarily made from wood, which contains cellulose fibers that are necessary for paper production.
Step 2: Understand the role of cellulose fibers.
Cellulose fibers are the main component used in the paper, needing to be isolated from other materials within the wood.
Step 3: Analyze the role of lignin.
Lignin acts as a binder for cellulose fibers within wood and must be removed during the pulping process to free the cellulose fibers.