Mystery of Silicone Compounds

The video tutorial explains the structure and formation of silicones, starting with the repeating unit and general formula. It details the preparation of dimethyl chlorosilane through a reaction involving methyl chloride and a copper catalyst. The process continues with hydrolysis, leading to dimethyl dihydroxy silane, which undergoes condensation to form silicone. The final structure of silicone as a straight chain polymer with Si-O-Si linkages is highlighted.

What does the 'R' in the general formula R2 SiO represent?

• A halogen group

• A metal group

• An alkyl or aryl group

• A hydroxyl group

What catalyst is used in the preparation of dimethyl chlorosilane?

• Aluminum

• Zinc

• Copper

• Iron

At what temperature does methyl chloride react with silicone to form dimethyl chlorosilane?

• 150°C

• 100°C

• 200°C

• 250°C

What is lost during the hydrolysis of dimethyl chlorosilane?

• Oxygen

• Methane

• Hydrochloric acid

• Water

What type of polymer is silicone?

• Addition polymer

• Cross-linked polymer

• Condensation polymer

• Copolymers