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Chemistry
Which is the strongest Lewis base?
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Q. Which is the strongest Lewis base?
UPSEE
UPSEE 2010
Equilibrium
A
$ SbH_3 $
20%
B
$ AsH_3 $
0%
C
$ PH_3 $
0%
D
$ NH_3 $
80%
Solution:
More the availability of lone pair of electrons, more will be the basic character. As the size of V A group elements increases, basic character of their hydrides decreases. Thus, $NH _{3}$ is the strongest Lewis base among the VA goup hydrides.