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Question

High density polythene is obtained by:


A
polymerization of ethene in a hydrocarbon solvent in the presence of Ziegler-Natta catalyst
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B
polymerization of ethene under high pressure and temperature
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C
free radical polymerization of ethene at low-temperature polymerization peroxide
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D
polymerization of ethene in presence of carbon tetrachloride
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Solution

The correct option is A polymerization of ethene in a hydrocarbon solvent in the presence of Ziegler-Natta catalyst
Method of the preparation of high-density polythene-
It is formed when addition polymerisation of ethene takes place in a hydrocarbon solvent in the presence of a catalyst such as triethylaluminium and titanium tetrachloride (Ziegler-Natta catalyst) at a temperature of $$333 K$$ to $$343 K$$ and under a pressure of $$6-7$$ atmosphere,
The correct option is $$[A]$$.

Chemistry
NCERT
Standard XII

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