On heating, the temperature of the melting solid

Options

A. increases
B. decreases
C. remains constant
D. may increase or decrease depending upon the nature of the solid

Explanation

**Step-by-Step Solution:**

1. **Understanding Melting**: When a solid is heated, it begins to melt. Melting is the process where a solid turns into a liquid.

2. **Intermolecular Forces**: In a solid, particles are closely packed together and held by strong intermolecular forces. As the solid heats up, these forces need to be overcome for the particles to move freely and form a liquid.

3. **Heat Absorption**: During the melting process, the heat energy supplied is used to break these intermolecular forces rather than increasing the kinetic energy of the particles. This means that the energy goes into changing the state of the substance rather than raising its temperature.

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