Question

Which of the following are correct?
i. Basic structural unit of silicates is –\( \text{-RSiO-} \)
ii. Silicones are biocompatible
iii. Producer gas contains CO and \( \text{N}_2 \)

• A. i, ii, iii
• B. ii, iii only
• C. i, iii only
• D. i only

Hint:

Silicones are widely used in medical and industrial applications due to their thermal stability and biocompatibility. Producer gas is used as a fuel for industrial heating.

Answer 1

The Correct Option is B

Explanation: - The basic structural unit of silicates is actually the \({SiO}_4^{4-}\) tetrahedron, not \({-RSiO-}\). So statement (i) is incorrect.
- Silicones are biocompatible and widely used in medical implants and prosthetics, making statement (ii) correct.
- Producer gas is a mixture of carbon monoxide (CO) and nitrogen (N_2), which is a result of the partial combustion of carbon-based fuels in a limited oxygen supply. Thus, statement (iii) is also correct.
- Since statements (ii) and (iii) are correct, the correct answer is option (B).