Question

Which one of the following is not a synthetic fiber?

• A. polyester
• B. nylon
• C. acrylic
• D. silk

Answer 1

The correct option is D

silk

Explanation for correct option

(D) Silk

Fibers

• Fibers are long, thin, flexible structures that resemble threads.
• These might be converted into textiles by being spun into yarns.
• They are mainly classified as natural and synthetic fibers.
• Natural fibers are produced by plants, animals, and geological processes.
• The term "synthetic fibers" refers to fibers produced by humans.
• Small molecule polymers are produced and then used to make synthetic fibers.

Silk

• Silk is a natural fiber.
• Insects produce it as a material for their cocoons and nests.

Explanation of incorrect options

(A) Polyester

• The most widely used synthetic fiber in the world is polyester, which is made from oil.
• The Polyester is a form of polymer in which each repeat unit of the main chain has an ester functional group.

(B) Nylon

• Any synthetic plastic substance made of high-molecular-weight polyamides is known as nylon.
• It is typically, but not always, produced as a fiber.
• Nylon polymers offer a wide range of commercial uses in textiles and fibers.

(C) Acrylic

• The characteristics of acrylic fiber, a synthetic fiber, closely mimic those of wool.
• Acrylic fiber is commonly utilized in sweaters, tracksuits, boot and glove linings, as well as furnishing fabrics and carpets.

Therefore, the correct option is (D) Silk.