Evaluating polymer statements for accuracy

Steps:

• Recall definitions: Addition polymerization forms chains without byproducts; condensation forms linkages like amide or ester with byproducts.
• Identify polymer types: Nylon is a polyamide (condensation); Terylene is polyester (condensation).
• Check hydrolysis products: Proteins yield amino acids; carbohydrates like starch yield sugars.
• Verify elemental composition: Carbohydrates consist of C, H, O in 1:2:1 ratio.

Why D is correct:

• Starch is a polysaccharide carbohydrate with empirical formula (C6H10O5)n, containing only carbon, hydrogen, and oxygen.

Why the others are wrong:

• A: Nylon and Terylene form by condensation polymerization, releasing water, not addition.
• B: Nylon has amide linkages (-CONH-), but Terylene has ester linkages (-COO-).
• C: Hydrolyzing proteins produces amino acids, not simple sugars; sugars come from starch or glycogen.

Final answer: D