Q. An important step in the manufacture of pulp for paper industry from the woody tissues of plants is the :
A) preparation of pure cellulose by removing lignin
B) removal of oils present in the wood by treatment with suitable chemicals
C) removal of water from the wood by prolonged heating at approximately 50°C
D) treatment of wood with chemical that breakdown cellulose
Explanation
[Solution from source] Paper is made from cellulose fibres, so pulping removes lignin chemically (for example by the sulphate or sulphite process) and leaves relatively pure cellulose. Breaking down the cellulose would destroy the very fibres that make up paper. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.