Question

why does food get spoiled if we freeze it when its hot

Answer 1

Because when the hot food is kept in the refrigerator the hot food going into the fridge releases some water like drops into the food and the that makes the food spoil.
For example.
It is like when the lid is kept on the hot rice it releases some water which we can see on the lid.
This is just for an example.
Hope it helped u