| List-I (Type of Crystalline Solid) | List-II (Example) |
| (A) Ionic | (III) Sodium Chloride, NaCl |
| (B) Covalent | (IV) Diamond, C |
| (C) Molecular | (I) Methane, CH4 |
| (D) Metallic | (II) Copper, Cu |
Crystalline solids are categorized by their bonding:
• Ionic solids: are held by electrostatic forces (NaCl).
• Covalent solids: have covalent network bonds (Diamond, C).
• Molecular solids: held by weak forces (Methane, CH4).
• Metallic solids: have delocalized electrons(Copper, Cu).
The correct answer is: (A) - (III), (B) - (IV), (C) - (I), (D) - (II)
| List-I | List-II |
|---|---|
| (A) CCl4 | (i) Insecticide |
| (B) CF2Cl2 | (ii) Refrigerant |
| (C) CHI3 | (iii) Antiseptic for wounds |
| (D) CH2Cl2 | (iv) Propellant for aerosols |