Question

An acid is a substance which

• A. accepts a lone pair of electron(Lewis concept)
• B. donate a proton ( Lowry and Bronsted concept)
• C. (a) and (b) above.
• D. None of the above

Answer 1

The correct option is C (a) and (b) above.

According to Lewis concept, acid is a ion or molecule which can accept a pair of electron.
for exxaple - $B{F}_3,AlC{l}_3$ etc.
According to Lowry and Bronsted concept, acids are ion or molecule which has tendency to donate proton.
for example- $HCl\left(aq\right)\rightleftharpoons H^{+}\left(aq\right)+C{l}^{-}\left(aq\right)$