Question

Give two example of the diffusion of a solid in another solid​

Answer 1

Give one example of the diffusion of a solid in another solid . If you write something on the blackboard &leave it uncleaned for a longer time you will find difficult to claean the blackboard afterwards.this is because of the diffusion of chalk particles into the blackboard.

Answer 2

copper convert into rusty

iron convert into rust by moisture for both