How are network solids,such as diamond,C,and quartz,SiO₂,distinguished from molecular crystals such as I₂?

Question

Quizplus · Accepted Answer

Network solids such as diamond and quartz have very high melting points due to their strong intermolecular forces and rigid structures. Molecular crystals such as I₂ have weaker intermolecular forces, resulting in lower melting points. Therefore, option A is correct. Option B is incorrect as both network solids and molecular crystals are covalent substances. Option C is incorrect as network solids such as diamond and quartz do not dissolve in water, while molecular crystals such as I₂ can dissolve in water. Option D is incorrect as network solids such as diamond and quartz are nonconductors of electricity, while molecular crystals such as I₂ can sometimes conduct electricity in the molten or dissolved state. Option E is incorrect as both network solids and molecular crystals do not have individual molecules of fixed size, as they are made up of repeating units.

How Are Network Solids,such as Diamond,C,and Quartz,SiO2,distinguished from Molecular Crystals

How Are Network Solids,such as Diamond,C,and Quartz,SiO₂,distinguished from Molecular Crystals