Question

Which of the following statements is false?
(A) The repeat unit in natural rubber is isoprene.
(B) Both starch and cellulose are polymers of glucose.
(C) Nylon $ 6,6 $ is an example of an elastomer.
(D) Artificial silk is derived from cellulose.

Answer 1

Hint :We know that the polymers are formed by the repetitive unit of monomer either by natural process or by synthetic process. Nylon $ 6,6 $ is a synthetic polymer which is formed from a condensation reaction of two monomer units known as hexamethylenediamine and adipic acid.

Complete Step By Step Answer:
The polymers are defined as a large unit composed of many repetitive monomer units. The process of formation of polymers is known as polymerization. Polymers are usually two types: natural polymer and synthetic polymers. The natural polymers are those polymers which are derived naturally, for example silk, natural rubber. The synthetic polymers are those polymers which are prepared in laboratories, for example nylon, PVC. Nylon $ 6,6 $ is a synthetic polymer which is a polyamide or nylon. The nylon $ 6,6 $ is formed of two monomer units each containing 6 carbon atoms. The two monomers are hexamethylenediamine and adipic acid which combine to give nylon $ 6,6. $
The synthesis of nylon $ 6,6 $ is done by polycondensation of hexamethylenediamine and adipic acid. During the reaction equivalent amounts of hexamethylenediamine and adipic acid are reacted with water. The copolymer is defined as the polymer which is derived from more than one monomer unit. The polymerization of a monomer unit to form a copolymer is called copolymerization. As nylon 6,6 is formed from two monomers hexamethylenediamine and adipic acid, it is a copolymer.
Therefore, the correct answer is option C.

Note :
Note that elastomers can be stretched by applying small force but fibres have high tensile strength and less elasticity. Homopolymers are defined as those polymers which are formed of a single monomer unit. The copolymer formed by the process of copolymerization of two monomer units is also known as biopolymer.