Ncert Exercises & Solutions

Me₃SiCl is used during polymerization of organ silicones because

a. Chain length of organic silicone polymers can be controlled by adding ${Me}_{3} SiCl$

b. ${Me}_{3} SiCl$ blocks the end terminal of silicone polymer

c. ${Me}_{3} SiCl$ improves the quality and yield of the polymer

4. ${Me}_{3} SiCl$ acts as a catalyst during polymerization

Choose the correct option

1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Hint: Me₃SiCl controlled the chain length of organic silicone polymer

Me₃SiCl is used during polymerization of organ silicones because it controlled the chain length or organic silicone. $(C H_{3})_{3} S i C l$ gives $(C H_{3})_{3} S i O H$ on hydrolysis. The two molecules of $(C H_{3})_{3} S i O H combine and formed$ hexamethyldisiloxane.

Since this compound has no $O H$ groups it can not polymerize any further.

Me₃SiCl also blocks the end terminal of silicone polymer.

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