Question

Have you seen things made from clay ,clay is a type of soft earth that can be moulded into different shapes.When clay is baked,it becomes very hard ,is it a reversible or irreversible change

Answer 1

Yes, clay is a type of soft earth which can be moulded into different shapes and when it is baked it becomes very hard. This is an Irreversible change because the baken clay cannot be changed back to its raw form.As we know clay is a type of soil,it contains many type of substances and some of its components melt earlier to the others and they mix and merge in the whole matter.

When the temperature decreases this feels in their melted and mixed form only and take the shape given before raising the temperature.

Answer 2

Explanation:

It is irreversible change as we can't get the original clay after heating