Question

7. For which of the following compounds is the crystalline solid a molecular solid: SiO2, CaCl2, CO2, diamond, KCI? Explain your reasoning.

Answer 1

Molecular solid exist as a unit of molecules, many molecules are attracted via intermolecular force of attraction

Among given: CO₂ is the crystalline molecular solid as it exist in the form of molecules

While other like : SiO2 ,diamond are network solid, it does not exist as molecules

CaCl2 and KCl are ionic solid because they exist as cation and anion