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BITSAT 2018
Exam
BITSAT
Year
2018
Subject
Chemistry
Chapter
p Block Elements (Group 13 & 14)

BITSAT 2018 · Chemistry · p Block Elements (Group 13 & 14)

The correct statement about silicone is

The correct statement about silicone isThe correct statement about silicone is

Options

  1. AThey are ketones with silyl group (SiH3)\left({SiH}_{3}\right) similar to alkyl, \left({SiH}_{3}\right)2CO
  2. BThey are synthetic polymer containing repeated R2SiO2units{R}_{2}{SiO}_{2}units.
  3. CThey are formed by hydrolysis of R2SiCl2{R}_{2}{SiCl}_{2}.
  4. DAll of the above

Correct answer

C. They are formed by hydrolysis of R2SiCl2{R}_{2}{SiCl}_{2}.

Step-by-step solution

Silicones are synthetic organo-silicon polymers containing repeated R2SiO{R}_{2}SiO units. Since the empirical formula is same as that of a ketone \left({R}_{2}CO\right),thenamesiliconhasbeengiventothesematerials.Theycanbeformedbyhydrolysisofdichlorosilanes, the name silicon has been given to these materials. They can be formed by hydrolysis of dichlorosilanes\left({R}_{2}{SiCl}_{2}\right)</p><p></p><p>{R}_{2}{SiCl}_{2} + 2{H}_{2}O ⟶ {R}_{2}Si\left(OH\right)2 + 2HCl

The correct statement about silicone is

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