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JEE Main levelOne or more correct optionsDifficulty 2 of 3pb157

Select the correct statement(s) about silicones.

  1. AThey are water repellent.
  2. BThey are chemically inert and thermally stable.
  3. CThey are made by hydrolysis of alkylchlorosilanes.
  4. DTheir backbone consists of alternating Si and C atoms.

Answer: A, B, C

Silicones have an Si-O-Si backbone with organic side groups, giving water repellence and stability (A, B true). They are prepared from hydrolysis (C true). The backbone is Si-O, not Si-C (D false).
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