Question

Which of the following statements is false?
A. Thermoplastics are linear polymers
B. Both starch and cellulose are polymers of glucose
C. Nylon-66 is an example of elastomer
D. Rayon can absorb over 90% of its own mass of water and does not stick to wound

Answer 1

In the given question, we are required to find out the false statement from the statements in the given options. So, we will evaluate the statements given in options and explain each one of them, and get to the final answer.
Carbohydrates are classified into three types mainly. They are monosaccharides, oligosaccharides, and polysaccharides. Monosaccharides like glucose can be obtained by the hydrolysis of polysaccharides like starch and cellulose. The repeating arrangement of monomers gives the polymers.

Complete answer:
The correct answer to this question is option C, Nylon-66 is not an example of elastomer. Thus the statement of option C is incorrect and thus, option C is the correct option.
Let us see from the first option if they are correct or incorrect.
Option A states that the thermoplastics are linear polymers, the statement is true. A linear polymer is one in which each repeating unit is linked only to two others.
Thus, option A is not the correct option.
Now, option B states that starch and cellulose are both polymers of glucose. The statement of this option is also true, starch and cellulose are polymers of many monosaccharide units of glucose. They are both polysaccharides and have very similar nature.
Thus, option B is not the correct option.
Now, option C states that Nylon-66 is an example of elastomer. The statement given in the option is false, Nylon-66 is a polyamide or one type of nylon made up of two monomers called hexamethylenediamine and adipic acid.
Thus, as the statement of option C is incorrect, option C is the correct option.
Now, option D states that rayon can absorb over 90% of its own mass of water and does not stick to wounds. The statement given in this option is correct. One of the important applications of rayon is that it is used for dressing wounds and it can absorb 90% of its own mass of water and doesn't stick to wounds. It is also a good alternative to cotton.
Thus, option C is the correct option.

Note:
Nylon-66 is not the only type of nylon available, there are many other types of nylon, such as Nylon 6, Nylon 6/9, Nylon 6/10, etc. Artificial silk is made from cellulose, which is obtained from cotton or wood pulp.