Match the solids in column I with the properties in column II — Solid State Chemistry Question

💡 Solution & Explanation

Germanium is a covalent network solid (high melting) (Q). Potassium chloride is an ionic solid that conducts electricity only in the molten state (P). Sodium is a metallic solid with a moderate melting point (about 373 K) and is a good conductor (S). Solid methane is a non-polar molecular solid held by weak Van der Waals forces, melting far below room temperature (R). Therefore, correct pairs are A $\rightarrow$ Q; B $\rightarrow$ P; C $\rightarrow$ S; D $\rightarrow$ R.