Question

silicones are prepared in .....

a) single steps
b) three steps
c) two steps
d) multi steps ​

Answer 1

Answer:

The answer is a option A

Answer 2

Answer:

c) two steps . (But usually number of steps depends on the complexity of the silicon prepared.)

Explanation:

Silicones are usually prepared by hydrolysis method.

hydrolysing dialkyldichlorosilanes (R2SiCl2)

or diarlydichlorosilanes (Ar2SiCl2), these are prepared by passing vapours of alkyl or aryl chloride over Silicones at a temperature of 570K in presence of a copper catalyst , Silicones are produced.

Step 1 : preparation of R2SiCl2 or Ar2SiCl2 by passing vapours of Arcl or RCl.

step 2 : hydrolysis of R2SiCl2 / Ar2SiCl2 to form Silicones.