Question

Which of the following is not a natural polymer?

• A. Protein
• B. Starch
• C. Rubber
• D. Rayon

Answer 1

The Correct Option is D

The question asks us to identify which of the given materials is not a natural polymer. Let's analyze each option:

1. Protein: Proteins are natural polymers composed of amino acid monomers. These polymers are essential to biological processes and are found in all living organisms. Thus, proteins are natural polymers.
2. Starch: Starch is a carbohydrate polymer made from glucose molecules. It is naturally occurring and found in many plants, serving as a way to store energy. Therefore, starch is a natural polymer.
3. Rubber: Natural rubber is obtained from the latex of certain plants. It is a polymer of isoprene and occurs naturally. Hence, rubber is a natural polymer.
4. Rayon: Rayon is a semi-synthetic fiber, made from cellulose, which is a natural polymer, but the processing involved converts it into a synthetic form. Therefore, rayon is not a natural polymer as it is artificially manufactured.

Based on the analysis, the correct answer is Rayon, as it is the only option that is not purely a natural polymer. Rayon is a semi-synthetic fiber derived from natural polymer but transformed through industrial processing.

Therefore, the answer is Rayon.