Question

Which of the following statements is false?

• A. Nylon-66 is an example of elastomer.
• B. The repeat unit in natural rubber is isoprene.
• C. Both starch and cellulose are polymers of glucose.
• D. Artificial silk is derived from cellulose.

Answer 1

The Correct Option is A

To determine which statement is false, let's evaluate each option based on chemical principles and facts about polymers:

1. Nylon-66 is an example of elastomer.

   This statement is incorrect. Nylon-66 is not an elastomer; rather, it is a type of polyamide, which is a thermoplastic polymer known for its strength and rigidity. Elastomers are rubber-like polymers such as natural rubber, which exhibit elasticity. Therefore, the statement is false.

2. The repeat unit in natural rubber is isoprene.

   This statement is true. Natural rubber is primarily composed of polyisoprene, which means its repeating unit is derived from the isoprene monomer (\(C_5H_8\)).

3. Both starch and cellulose are polymers of glucose.

   This statement is true. Starch and cellulose are polysaccharides composed of glucose units. However, they differ in structure; starch consists of glucose units linked by α-1,4 and α-1,6 glycosidic bonds, while cellulose is linked by β-1,4 glycosidic bonds.

4. Artificial silk is derived from cellulose.

   This statement is true. Artificial silk, also known as rayon, is produced from cellulose, which is extracted from wood pulp or cotton. The cellulose is chemically modified to create a fiber that resembles silk in appearance and texture.

In conclusion, the false statement is that Nylon-66 is an example of elastomer.