Question

give a chemical test to confirm the presence of an acid??

give a chemical test to distinguish an acid from a base...??

Answer 1

2 How to Distinguish Between Acids and Bases
Have you ever wanted to distinguish between acids or bases(alkalies)? Are you afraid of touching them due to their corrosiveness? Here is how to do this safely.
Method One of Seven:
By Blue Litmus
Add a liquid to the litmus or litmus paper.
Observe the effects:
Acids-Litmus turns red
Bases-Litmus remains blue
Neutral Liquids-Litmus stays blue

Answer 2

we can use metal and an acid to distinguish Acid from a base.
also we can take Metal carbonates .