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# State the temperature and pressure in the following reaction:$nCH_2=CH_2(Ethylene)\rightarrow -(CH_2-CH_2-)_n(polyethylene)$

$\begin{array}{1 1}(a)\;350-570K,1-2atm\\(b)\; 300-400K,1-2atm\\(c)\;350-570K,1000-2000atm\\(d)\;300-400K,1000-2000atm\end{array}$

Low density polythene is manufactured by heating pure ethylene to 350-570K under high pressure (1000-2000 atm) in the presence of traces of oxygen(0.03 to 0.1%)
Hence (c) is the correct answer.