Question

Which one of the following substances has the highest proton affinity ?

• A. $H_2S$
• B. $NH_3$
• C. $PH_3$
• D. $H_2O$

Answer 1

Answer: (B)

$NH_3$

Answer 2

Among the given compounds, the $NH_3$ is the most basic. Hence has highest proton affinity.