Interpretation:
Difference between molecular solid and a covalent network solid must be explained.
Concept introduction:
Depending on force of attraction there are different types of solid like ionic solid, molecular solid, covalent network solid etc.

Answer to Problem 22SSC
A molecular solid has a single unit whereas a covalent network solid is extended in three dimensions.
Explanation of Solution
Iodine is a molecular solid in which two I atoms are bonded with covalent bond.
In covalent network solid there is no distinct molecule or unit. For example in SiO2 each Si is bonded with 4 O atoms and each O is bonded with 2 Si atoms. Thus the structure is extended in all directions.
A molecular solid has distinct unit or molecule unlike a covalent network solid.
Chapter 12 Solutions
Chemistry: Matter and Change
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