I just need the answer choices, you don't need to explain the questions

11-12. A rubber chain is konown as a/an 11. becanse it axtomatically returns to a/an 12 state. when the force is removed after being stretched. 11. (a) crosslinked spring (b) graft copolymer (c) branched copolymer (d) copolymer spring (e) entropic spring 12. (a) convolutod (b) amorphous (c) crasslimked (d) crystalline (c) coiled 13-26. Polymers are based on chains of carbon atoms held together by 13 bonds. This gives the chains high strength, but the weakness in polymers which gives them flexibility is 14 . Below a certain temperature, called the 415 iemperature, polymers become brittle. For polystyrene, often encountered as styrofoam, it is The simplest and most common polymer is polyethylene, in which each carbon atom in the chain is attached to two hydrogen atoms. In polystyrene one of every four hydrogen atoms is replaced with a 17 . This makes the chain stiffer because of 18 . Some important materials are made using a mixture of polymer's called a(n) 19.HIPS is inciusions to a polystyrene matrix. In 2221 the chains using 2123 atoms and also by adding 24. Some because 26 atoms can do the same thing as does 24 helps by keeping the 25 out. 13. (a) tydrogen (b) ionic (c) covalent (d) metallic (c) both b \& c 14. (a) dislocations (b) crosslinks' (c) bonds missing electrons (d) secondary bonds (e) surface defects 15. (a) critical (b) recrystallization (c) glass transition (d) solidification (c) annealing 16. (a) well above 100C (b) around room temperature (c) below 0C (d) over 1000C (c) about 100C 17. (a) fluorine atom (b)chlorineatom(c)benzenering(d)sulfuratom (c) none of these 18. (a) steric hindrance (b) crosslinking (c) grain refining (d) work hardening (c) crystallization 19. (a) alloy (b) copolymer (c) bipolymer (d) amalgam (c) blend 20. (a) blend (b) block copolymer (c) bipolymer (d) graft copolymer (e) bridging polymer 21 (a) rubber (b) acrylic (c) carbide (d) interstitial (e) earbon 22. (a) crystallizing (b) hardening (c) crosslinking (d). lengthening (c), reducing 23. (a) carbon (b) sulfur (c) oxygen (d) lithium (c) phosphoras 24. (a) disiocations (b) precipitates (c) impurities of any sort (d) earbos blacks (c) nothing cxtra is added 25. (a) acids (b) sunlight (c) pollution (d) beavy use (o) ail 26. (a) carbon (b) sulfor (c) oxygen (d) nitrogen (c) bydrogen