Question

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

Answer 1

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.