Question

what are acidic buffers .? give an example

Answer 1

Acidic buffer solution contains equimolar quantities of a weak acid and its salt with strong base. An acidic buffer solution is simply one which has a pH less than 7. 
For example: an acetic acid, CH3COOH and sodium acetate I.e. CH3COONa.

Answer 2

Here is your answer dude ✌️✌️✌️✌️

A buffer solution is one which resists changes in pH when small quantities of an acid or an alkali are added to it. An acidic buffer solution is simply one which has a pH less than 7. Acidic buffer solutions are commonly made from a weak acid and one of its salts - often a sodium salt.
For example: an acetic acid, CH3COOH and sodium acetate I.e. CH3COONa. 

hope this helps you dude ✌️✌️✌️✌️