Question

At what temperature does the solid start melting?

1) -20°C
2) 0°C
3) 20°C
4) 80°C

Answer 1

The melting point of a solid is the temperature at which it changes to a liquid. The melting point depends on the strength of the attractive forces between its particles.

Step-by-step explanation:

The melting point of a solid is the temperature at which it changes from a solid to a liquid. For example, ice (solid H₂O) has a melting point of 0 °C.

The melting point of a substance depends on the strength of the attractive forces between its particles. Sodium chloride (NaCl), which is an ionic compound, has a high melting point of 801°C due to the strong ionic bonds present.