7. Which one of the following polymer is prepared by condensation polymerization?(A) Dacron (B) Teflon(C) Styrene (D) Rubber8. Which one of the following is biodegradable polymer?(A) Nylon-6,6 (B) Glyptal(C) Cellulose (D) PVC
(A) Dacron is condensation polymer. It is formed by condensation of ethylene glycol and terephthalic acid.
(C) Cellulose is biodegradable polymer.