The straight chain polymer is formed by

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(C) The hydrolysis of dimethyl dichlorosilane,$(CH_3)_2SiCl_2$,produces a dihydroxy derivative,$(CH_3)_2Si(OH)_2$.This dihydroxy derivative undergoes

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hydrolysis of $(CH_3)_2SiCl_2$ followed by condensation polymerisation

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(C) The hydrolysis of dimethyl dichlorosilane,$(CH_3)_2SiCl_2$,produces a dihydroxy derivative,$(CH_3)_2Si(OH)_2$.This dihydroxy derivative undergoes condensation polymerisation to form a straight chain silicone polymer,as shown in the reaction:$n(CH_3)_2SiCl_2 + 2nH_2O \rightarrow n(CH_3)_2Si(OH)_2 + 2nHCl$$n(CH_3)_2Si(OH)_2 \rightarrow -[O-Si(CH_3)_2-O]_n- + nH_2O$

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