Viscose rayon classification: complete the definition—viscose rayon is best described as __________.

Introduction / Context:
Man-made cellulosic fibres are derived from natural cellulose that is chemically processed and then regenerated into filaments. Viscose rayon is the archetype of this family.

Given Data / Assumptions:

• The original options missed the exact wording; applying the Recovery-First Policy, we correct the set to include the proper term.
• We distinguish between nitrate, acetate, and viscose processes.

Concept / Approach:
Viscose rayon is produced by xanthating cellulose to form cellulose xanthate, dissolving it in alkali, and extruding into an acid bath to regenerate cellulose filaments. This outcome is regenerated cellulose, not nitrate (celluloid) nor acetate (cellulose acetate).

Step-by-Step Solution:
Identify viscose process → cellulose derivatisation and regeneration.Match to “regenerated cellulose”.Eliminate nitrate and acetate variants.

Verification / Alternative check:
Textile chemistry references classify viscose rayon squarely as regenerated cellulose fibre.

Why Other Options Are Wrong:
Cellulose nitrate/acetate belong to different fibre families with distinct processing.“None” is invalid because the correct descriptor exists.

Common Pitfalls:
Confusing “rayon” generically with acetate; acetate is a separate man-made cellulosic.

Final Answer:
Regenerated cellulose