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Silicones are sunthetic polyners conitai...

Silicones are sunthetic polyners conitainging repeated `R_2 SiO` units . Since the empirical formula is that of a ketone `(R_2 CO)`, the name Silicone has eeen given to these materils . Siliconse can be makde intio oils , rubbery eleastomers and resins . They find a varely of appoications because of their chemical inctness , water repelling nature m heat resistance and good electical insulationg property .
Commerical silicon polumers are usuallly metghly synthesised by the hudroluysis of
` R_2 SiCl_2 [R = Methyl (Me ) or phenyl ( phi)]`
.
If we strt with `SiMeCl_3` as the starting material silicones formed is :

A

`Me-underset(Me)underset(|)overset(Me)overset(|)(Si)-O-underset(Me)underset(|)overset(Me)overset(|)(Si)-O-underset(Me)underset(|)overset(Me)overset(|)(Si)-O-underset(Me)underset(|)overset(Me)overset(|)(Si)-O-Me`

B

C

Bot of the above

D

None of the above

Text Solution

Verified by Experts

The correct Answer is:
B
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Silicones are sunthetic polyners conitainging repeated R_2 SiO units . Since the empirical formula is that of a ketone (R_2 CO) , the name Silicone has eeen given to these materils . Siliconse can be makde intio oils , rubbery eleastomers and resins . They find a varely of appoications because of their chemical inctness , water repelling nature m heat resistance and good electical insulationg property . Commerical silicon polumers are usuallly metghly synthesised by the hudroluysis of R_2 SiCl_2 [R = Methyl (Me ) or phenyl ( phi)] . If we mix SiMe_3Cl with SiMe_2Cl_2 , we get silicones of the type .

Silicon is a

Silicone resins are made by:

Silicones have the general formula

MOTION-P-BLOCK ELEMENTS-Exercise - 2 Objective Problems | JEE Adv.
  1. Read name silica covers an entire group of minereal, which have the ge...

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  2. Silicones are synthetic polymers containing repeated R2 SiO units . Si...

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  3. Silicones are sunthetic polyners conitainging repeated R2 SiO units . ...

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  4. The general formula of cyclic or ring silicates is

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  6. Silica is reacted with sodium carbonate . What is the gas liberateed ?

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  11. There are some deposits of nitrated and phosphates in the earth's crus...

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