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Question

Which of these is not a monomer for a high molecular mass silicone polymer ?

NEET 2013

A
Me3SiCl
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B
PbSiCl3
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C
MeSiCl3
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D
Me2SiCl2
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Solution

The correct option is A Me3SiCl
PbSiCl3,MeSiCl3,Me2SiCl2are monomers for a high molecular mass silicone polymer.
Silicones are organo-silicon polymer containing linkage.
Since Me3SiCl contain only one Cl therefore it can't form high molecular mass silicon polymer. At best, it can form a dimer.It act a chain terminating organo-silane


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