Question

Which compound is an example of a network solid? 1. H2O(s) 2. CO2(s) 3. SiO2(s) 4. SO2(s)

Answer 1

I believe the answer is 3. SiO2(s)

Answer 2

Hello There!

It is definitely Silicon dioxide. 
Network solids have no individual molecules.
Therefore, making your answer C. SiO2.

Hope This Helps You!
Good Luck :)