Which of the following is also known as cellulose acetate?

Rayon

The correct answer is option 3. Rayon.

Cellulose acetate is a type of rayon. Rayon is a semi-synthetic polymer made from natural cellulose, which is derived from wood pulp or cotton linters. The production process involves treating cellulose with acetic acid, acetic anhydride, and sulfuric acid to produce cellulose acetate. This material is then dissolved and spun into fibers.

Other Options:

Dacron: This is a brand name for a type of polyester (polyethylene terephthalate or PET). It is not related to cellulose acetate.

Orlon: This is a brand name for polyacrylonitrile (PAN), a type of acrylic fiber. It is also not related to cellulose acetate.

Nylon 6: This is a synthetic polymer made from caprolactam through a process called ring-opening polymerization. It is not related to cellulose acetate.

Rayon, specifically cellulose acetate, is produced by acetylating cellulose with acetic acid and acetic anhydride. This modification of cellulose improves properties like durability, sheen, and resistance to shrinkage and wrinkles, making it a versatile material used in textiles, films, and plastics.

Rayon is the correct answer because it is a semi-synthetic fiber derived from cellulose and chemically processed to form cellulose acetate. The other options (Dacron, Orlon, and Nylon 6) are synthetic polymers not derived from cellulose.