A Brønsted-Lowry base is defined as a substance that?

A. Acts as a proton donor

B. Increases [H+] when placed in H2O

C. Increases [OH-] when placed in H2O

D. Decreases [H+] when placed in H2O

E. Acts as a proton acceptor

According to Brønsted-Lowry theory,

Acid is any compound which transfers or donate H ⁺.

Base is any compound which accepts H⁺.

Example:

NH₃ + HCl → NH₄⁺ + Cl⁻

In Above Example NH₃ is acting as a Base, while HCl is acting as a Acid.

Result:

Option - E. (Acts as a proton acceptor) is the correct answer.