Question

What is acid???????​

Answer 1

Meaning of word Salt:- In Latin word acid means sour.

Definition of acid:- An acid is a compounds when dissolved in water gives H+ ion in aqueous solution but H+ ion has not independent existence. This statement is known as ''Arrhenius Theory''.

Or

In other words acids are proton donar since H+ ion is equivalent to proton. This theory is known as ''Lowry-Bronated's Theory''.

Answer 2

Acid is the substance which give H+ ions in aqueous  solution