How is polyethene produced by the polymerisation reaction of ethylene?
OR
How can the following conversion be carried out?
HC = CH → CH3CH3
WBBSE
Class X
Physical Science
Organic Chemistry
2
2023
Polymerisation of ethylene: Ethylene is liquified at high pressure (1500-2000 atm). In the presence of catalysts such as peroxide, oxygen or chromium oxide and at temperatures 150℃-200℃, a large number of ethylene molecules join to form a white solid called polyethylene or polythene.
nC2H4→(C2H4)n
OR
The conversion of ethyne (HC≡CH) to ethane (CH₃CH₃) can be carried out through hydrogenation using platinum (Pt) as a catalyst.
HC = CH + H2 {\overset{Pt}{\longrightarrow}} CH3CH3
Related Questions
More WBBSE Hard level questions
1/12
Q.
Write the names of two national parks of West Bengal.
A.
Sundarban National Park and Jaldapara National Park. Explanation: Sundarban is famous for...
Q.
Write one function each of chromoplast and Golgi apparatus.
A.
Chromoplast – provides color to fruits and flowers. Golgi apparatus – helps...
Q.
Write the names of two non-nitrogenous waste products of plants.
A.
Carbon dioxide and water vapor. Explanation: During respiration and transpiration, plants release...
Q.
Write the names of two structural parts of axon.
A.
Two parts are: Axon hillock Myelin sheath Explanation: The axon hillock is...
Q.
‘Scarcity of food and poaching are two main reasons behind the endangeredness of a mammal...
A.
Scarcity of food limits the survival and reproduction of mammals, weakening their...
Q.
What might be the environmental causes behind asthma?
A.
Asthma can be caused by environmental factors such as air pollution, dust,...
Q.
Explain the causes of endangeredness of Polar Bear and Gangetic Dolphin.
A.
The Polar Bear is endangered mainly due to global warming causing melting...
Q.
What environmental problems can originate if the concentration of different greenhouse gases polluting air increases...
A.
An increase in greenhouse gases causes global warming, leading to climate change,...
Q.
Prepare a list of reactants used and products in the experiment of Miller and Urey...
A.
Reactants Products Methane (CH4) Organic compounds Ammonia (NH3) Amino acids Hydrogen (H2)...
Q.
How does a Rohu fish float and sink in water?
A.
A Rohu fish floats and sinks in water by regulating the volume...
Q.
What types of struggle for existence can be found among the animals of a forest...
A.
The types of struggle for existence among forest animals over eating meat...
Q.
What advantages did Mendel enjoy owing to pea-flowers being bisexual and self pollinating?
A.
Mendel enjoyed two advantages: Bisexual flowers contain both male and female reproductive...