Question

Hard solids have _________ melting point while soft solids have _________melting point.

• A. high
• B. low

Answer 1

1. Melting point depends upon the inter-molecular force of attraction between the molecule.
2. Greater is the force of attraction between them more is the melting point and vice versa.
3. Hard solids have a high melting point because hard solids are tightly bound and the inter-molecular force of attraction between the molecules is high.
4. Soft solids have a low melting point because the inter-molecular force of attraction between the molecules is low.

Hence, hard solids have high melting point while soft solids have low melting point.