The question asks to identify the material obtained through the chemical treatment of wood pulp.

Rayon From Wood Pulp Explained

Wood pulp is the primary raw material used in the production of Rayon. It is a cellulosic material, typically derived from trees like pine, spruce, or eucalyptus.

The Chemical Treatment Process

The process involves several chemical steps:

• Wood is first processed into pulp, which is essentially purified cellulose.
• This cellulose undergoes chemical treatment using solutions like sodium hydroxide (caustic soda) and carbon disulfide.
• This treatment converts the cellulose into a thick liquid called viscose.
• The viscose solution is then pumped through tiny holes in a spinneret and immersed in an acid bath (usually sulfuric acid).
• This causes the cellulose to regenerate, forming fine filaments.
• These filaments are collected and processed further to create yarn, which is then used to make fabrics.

Because Rayon is derived from natural cellulose (wood pulp) but processed using chemicals to form fibers, it is often referred to as a semi-synthetic or regenerated cellulosic fiber.

Analyzing Other Options

Let's look at why the other options are incorrect:

• Cotton: Cotton is a natural fiber that grows from seeds of the cotton plant. It is harvested and processed mechanically and chemically, but it is not derived from wood pulp.
• Polyester: Polyester is a synthetic fiber, entirely man-made. It is derived from petroleum-based chemicals through a process called polymerization. It does not involve wood pulp.
• Nylon: Nylon is also a synthetic fiber, created through chemical synthesis, typically involving petroleum products. It is not related to wood pulp.

Conclusion

Based on the manufacturing process, Rayon is the fiber specifically obtained by the chemical treatment of wood pulp.