Bagasse fibre composition: which of the following is NOT present in bagasse fibres from sugarcane residues?

Introduction / Context:Bagasse, a by-product of sugarcane processing, is an important lignocellulosic feedstock for paper, boards, and bio-based materials. Its fibrous component contains the typical triad of plant polymers.

Given Data / Assumptions:

• We refer to untreated bagasse fibre composition.
• “Pentosans” denotes hemicellulose fractions rich in pentose sugars.
• One option must state that all listed components are indeed present.

Concept / Approach:Bagasse fibres contain cellulose (structural backbone), hemicelluloses (pentosans), and lignin (aromatic binder). Therefore, none of the listed components are absent; the correct choice is “None of these.” Industrial pulping adjusts these constituents but the raw fibre includes all three.

Step-by-Step Solution:Check each component against known lignocellulosic composition.Confirm presence of cellulose, lignin, and pentosans.Select “None of these.”

Verification / Alternative check:Pulp and paper references list typical bagasse composition: cellulose ~40–50%, hemicellulose ~20–30%, lignin ~18–24% (approximate ranges).

Why Other Options Are Wrong:Each of (a)–(c) is genuinely present; claiming otherwise would be incorrect.

Common Pitfalls:Confusing processed/pulped bagasse fractions with the raw fibre composition.

Final Answer:None of these