Question

select the correct answer. which statement about polymers is true? a. polymers are substances that have relatively large molecules. b. oil and gas are the starting materials for making all polymers. c. fabrics such as nylon and silk are synthetic polymers. d. all polymers are obtained from living organisms.

Explanation:

Polymers are substances made up of large - molecular - weight repeating units. Option A is correct as polymers have relatively large molecules. Oil and gas are sources for synthetic polymers but not the starting materials for all polymers (so B is incorrect). Fabrics like nylon are synthetic polymers but silk is a natural polymer, not a synthetic one (so C is incorrect). Not all polymers are derived from living organisms; there are synthetic polymers (so D is incorrect).

Answer:

A. Polymers are substances that have relatively large molecules.