Question

What happens when silicon is heated with methyl chloride in presence of copper as a catalyst at 573K?

• A. Methyl substituted chlorosilanes are formed
• B. Only $M{e}_4$ Si is formed
• C. Polymerised chains of $(C{H}_3{)}_{3}SiCl$ are formed
• D. Silicones are formed

Answer 1

The correct option is A Methyl substituted chlorosilanes are formed

Heating of Silicon with methyl chloride at high temperature in the Presence of copper produces a mixture of mono, di and tri methylchlorosilanes and tetramethylsilane.

$C{H}_{3}Cl+Si\underset{570K}{\overset{\text{Cu Powder}}{\to }}C{H}_{3}Si{Cl}_3+{\left(C{H}_3\right)}_{2}Si{Cl}_2+{\left(C{H}_3\right)}_{3}SiCl+{\left(C{H}_3\right)}_{4}Si$

Methyl substituted chlorosilanes are formed.

Hence, the correct answer is option $\text{A}$.