Question

How the melting point of a solid should be the same as the freezing point of the liquid of the same substance
plz explain giving examples

Answer 1

The melting point and freezing point describe the same transition of matter, in this case from liquid to solid (freezing) or equivalently, from solid to liquid (melting).
For example, melting point of ice and freezing point of water is 0℃. While water is freezing or melting, its temperature is not changing. It is stuck on 0℃ during the entire melting or freezing process.

So to sum this all up, when a substance is transitioning from solid to liquid (melting) or liquid to solid (freezing), its temperature is fixed at the melting or freezing point, which is the same temperature.