Question

According to Bronsted-Lowry concept, an acid is a substance which is

• A. a proton donor
• B. a proton accepter
• C. an electron pair acceptor
• D. an electron pair donor

Answer 1

The correct option is A a proton donor

According to Bronsted Lowry theory, acids are proton donors and bases are proton acceptors.
For example-
$HCl\to H^{+}+C{l}^{-}$
HCl is donating a proton in the aqueous medium. Hence, it is an acid.

Option A is correct.