In which of the following the polymer is correctly matched with the catalyst used for its preparation?
I. Teflon - Persulphate
II. Low density polythene - Triethyl aluminium and titanium tetrachloride
III. Terylene - Zinc acetate/antimony trioxide
In which of the following the polymer is correctly matched with the catalyst used for its preparation?
I. Teflon - Persulphate
II. Low density polythene - Triethyl aluminium and titanium tetrachloride
III. Terylene - Zinc acetate/antimony trioxide
Show Hint
- I, III only
- I, II only
- II, III only
- I, II, III
The Correct Option is A
Solution and Explanation
Teflon (polytetrafluoroethylene or PTFE) is made by the free radical polymerization of tetrafluoroethylene. Persulphate catalysts are used in the polymerization of tetrafluoroethylene to form Teflon. Thus, I is correct.
2. Low density polythene (LDPE):LDPE is made by the free radical polymerization of ethylene under high pressure and in the presence of peroxide initiators. Triethyl aluminium and titanium tetrachloride (Ziegler-Natta catalyst) are used for the preparation of high-density polyethylene (HDPE), not LDPE. Thus, II is incorrect.
3. Terylene (Dacron):Terylene is a polyester formed by the condensation polymerization of ethylene glycol and terephthalic acid. Zinc acetate/antimony trioxide is used as a catalyst in the preparation of Terylene. Thus, III is correct.
Therefore, the correctly matched sets are I and III.
Final Answer:I, III only.
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