Question

Correct statements among (a) to (d) regarding silicones are:
(a) They are polymers with hydrophobic character.
(b) They are biocompatible.
(c) In general, they have high thermal stability and low dielectric strength.
(d) Usually, they are resistant to oxidation and used as greases.

• A. (a),(b) and (c) only
• B. (a) and (b) only.
• C. (a), (b), (c) and (d)
• D. (a), (b) and (d) only

Answer 1

The correct option is D (a), (b) and (d) only

Correct option is D)
Silicones are the polymer of silicon containing $[-{\left(R\right)}_{3}Si-O-]$ linkage.
It is a polymer with hydrophobic character thus used in making water- resistant seals.

They are biocampatible.

The silicones are thermally stable compounds and their stability comes from the high amount of energy required to break the Si−O and Si−Alkyl bonds. They also have high dielectric constant, thus, they are good insulators.
So statement (c) is incorrect.

They are also resistant to oxidation. Because of their wax-like texture, they are also used in greases.

Hence, the correct option is D.