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Q.

The straight chain polymer is formed by

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a

hydrolysis of CH3SiCl3 followed by condensation polymerisation

b

hydrolysis of (CH3)4Si by addition polymerisation

c

hydrolysis of (CH3)2SiCl2 followed by condensation polymerisation

d

hydrolysis of (CH3)3SiCl followed by condensation polymerisation

answer is C.

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Detailed Solution

Methyl chloride reacts with silicon  in presence of Copper as a catalyst at 300oc various types of Organo silanes like (CH3)2SiCl2 are formedwhich on hydrolysis followed by Polymerisation yields straight chain poymer known as straight chain silicones2CH3MgCl+SiCl4→CH32SiCl2+2MgCl2 OR 2CH3Cl+Si →Cu-powder catalyst;3000cCH32SiCl2Dichloro dimethyl silane
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