Question

An acid is a(n) _____.

Answer 1

a molecule of other entity that can donate a proton or accept an electron pair in reactions.

Answer 2

Answer:

many scientists have given may definition of an Acid  

Bronsted-Lowry theory stated that  an acid are the donor of proton and bases are acceptors of a proton.

According to Lewis Acid theory: An Acid is one which can accept an electron to form a covalent bond.

According to Arrhenius Acid: Acid is one in which H⁺ concentration is more          than  OH⁻