p-Block elementsHard
Question
Which one of the following is the strongest base ?
Options
A.AsH3
B.NH3
C.PH3
D.SbH3
Solution
Due to small size of N, it has high charge density and so repels the lone pair to maximum extent making it most available for protonation among these. On moving from P to Bi, size of atom increases and so lone pair becomes less available for protonation. Making then less basic.
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