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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.

1. (A), (B), (C) and (D)
2. (A), (B) and (C) only
3. (A) and (B) only
4. (A), (B) and (D) only

Correct answer: (A), (B) and (D) only

Solution

Silicones are known for their hydrophobic properties, making them water-repellent (A), they are also biocompatible, which allows them to be safely used in medical applications (B), and they exhibit resistance to oxidation, making them suitable for use as greases (D). However, they typically have high thermal stability and good dielectric strength, contradicting statement (C), which is why it is not included.

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