Explain the mechanism of polymerisation of ethylene by Zeigler-Nattaca

1.	Explain the mechanism of polymerisation of ethylene by Zeigler-Nattacatalyst.Q4a)a)What are extrinsic semiconductors? Explain n-type and p-typesemiconductor with suitable example.16]ORAnswer the following:161Write mechanism of hydrogenation of alkene to alkane using Raneynickel catalyst.ii) Explain the structure of haem b.Calculate crystal radii of Mg2+ ion having univalent radius 0.82A° (Given141Born exponent n = 7)OR141Answer the following:b)b)ii)What are the properties of heterogeneous catalysis?What is the IUPAC name and symbol of element having atomicnumber 134 and 967.
Answer» Answer: intrinsic semiconductor are dopped with suitable impurities to INCREASE ELECTRICAL conductivity is known as extrinsic semiconductor. Explanation: when silicon or germenium are dopped with group 15 element they are known as n-type semiconductor. electrons are MAJORITY charge carrier in n-type and HOLES are minority charge carrier. & when silicon or germenium are dopped with group 13 elements they are known as p-type semi conductors.Holes are majority charge carrier and electrons are minority charge carrier in p-type semiconductors.

Explain the mechanism of polymerisation of ethylene by Zeigler-Nattacatalyst.Q4a)a)What are extrinsic semiconductors? Explain n-type and p-typesemiconductor with suitable example.16]ORAnswer the following:161Write mechanism of hydrogenation of alkene to alkane using Raneynickel catalyst.ii) Explain the structure of haem b.Calculate crystal radii of Mg2+ ion having univalent radius 0.82A° (Given141Born exponent n = 7)OR141Answer the following:b)b)ii)What are the properties of heterogeneous catalysis?What is the IUPAC name and symbol of element having atomicnumber 134 and 967.

Answer»

Answer:

intrinsic semiconductor are dopped with suitable impurities to INCREASE ELECTRICAL conductivity is known as extrinsic semiconductor.

Explanation:

when silicon or germenium are dopped with group 15 element they are known as n-type semiconductor. electrons are MAJORITY charge carrier in n-type and HOLES are minority charge carrier.

when silicon or germenium are dopped with group 13 elements they are known as p-type semi conductors.Holes are majority charge carrier and electrons are minority charge carrier in p-type semiconductors.

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