Question

What happens when silicon is heated with methyl chloride at high temperature in presence of copper?

Answer 1

Heating of  Silicon with methyl chloride at high temperature in the Presence of copper produce a  mixture of mono, di and tri methylchlorosilanes and tetra methylsilanes.
CH3Cl + Si → CH3SiCl3 + (CH3)2SiCl2 +(CH3)3SiCl + (CH3)4Si 


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Answer 2

When silicon reacts with methyl chloride in the presence of copper (catalyst) and at a temperature of about 537 K, a class of organosilicon polymers called methyl-substituted chlorosilanes (MeSiCl3, Me2SiCl2, Me3SiCl, and Me4Si) are formed.