Question

Which one of the following is the strongest base?

• A. $AsH_3$
• B. $NH_3$
• C. $PH_3$
• D. $SbH_3$

Answer 1

Answer: (B)

$NH_3$

Answer 2

Amongst AH3 where -X - is group-15 elements, basic strength decreases from top to bottom. Hence, NH3 is strongest base.