Question

The straight chain polymer is formed by

• A. hydrolysis of $CH _{3} SiCl _{3}$ followed by condensation polymerisation
• B. hydrolysis of $\left( CH _{3}\right)_{4} Si$ by addition polymerisation
• C. hydrolysis of $\left( CH _{3}\right)_{2} SiCl _{2}$ followed by condensation polymerisation
• D. hydrolysis of $\left( CH _{3}\right)_{3} SiCl$ followed by condensation polymerisation

Answer 1

Answer: (C)

Hydrolysis of substituted chlorosilanes yields corresponding silanols which undergo polymerisation. Out of the given chlorosilanes, only $\left( CH _{3}\right)_{2} SiCl _{2}$ will give linear polymer on hydrolysis followed by polymerisation.