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11.21.    Explain the following reactions
  (a) Silicon is heated with methyl chloride at high temperature in the presence of copper;

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Silicon is heated with methyl chloride at high temperature in the presence of copper; as a catalyst at a temperature around 573K different types of methyl substituted chlorosilane are formed. for example-MeSiCl_3,Me_2SiCl_2,Me_3SiCl and a small amount of Me_4Si2CH_{3}Cl+Si\xrightarrow[Cu\ powder]{573K}(CH_{3})Si(Cl)_{2}\overset{hydrolysis}{\rightarrow}(CH_{3})_{2}Si(OH)_{2}

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