A) only high temperature
B) only catalyst
C) only high pressure
D) high temperature and high pressure
Correct Answer: D
Solution :
Polythene is obtained by the polymerization of ethylene at high temperature and high pressure. \[\underset{ethylene}{\mathop{n{{H}_{2}}C=C{{H}_{2}}}}\,\xrightarrow[High\,pressure]{High\,temperature}\underset{polythene}{\mathop{-(C{{H}_{2}}-C{{H}_{2}}){{-}_{n}}}}\,\]
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