MCQ practice · SSC Chemistry Board questions · Chapter 11: Mineral Resources: Fossils
Polymer 'Y':
- i. is made from propene
- ii. is a condensation polymer
- iii. is stronger and lighter than polythene
Think it through first, then pick an option.
- a i and ii
- b ii and iii
- c i and iii
- d i, ii and iii
Answer and explanation
Correct answer: c i and iii
Y is polypropylene: made from propene and stronger and lighter than polythene; it is an addition polymer.
Why the other options are wrong
- a i and ii: ii is wrong: Y is polypropylene, an addition polymer; the answer is i and iii.
- b ii and iii: ii is wrong and i is left out: polypropylene is made from propene; the answer is i and iii.
- d i, ii and iii: ii is wrong: propene molecules join directly with nothing small removed; so not all three.
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