Give examples of two relations such that one is an equivalence relation and the other is not.

Give one example of retardation.

Give two examples of hypnotic

Give two examples of solid solutions.

Show that the intersection of two equivalence relations in a set is again an equivalence relation in the set

Prove that the intersection of two equivalence relations in a set is an equivalence relation and give an example to show that the union of two equivalence relations in a set is not necessarily an equivalence relation.

Give one example of semiconductor.

Give two examples of double salts.

Give two examples of free fall.