Question

Which is not true about $Si{O}_2$ :

• A. It is a network solid
• B. It is attacked by molten NaOH
• C. It is attacked by HF
• D. It is the basic structural unit of silicates

Answer 1

The correct option is D It is the basic structural unit of silicates

Silica is attacked only by HF and NaOH and it is unreactive to most other acids, metals and halogens. However, the basic structural unit of silica is $Si{O}_4^{4-}$.