With respect to protonic acids, which of the following statements is correct ?
With respect to protonic acids, which of the following statements is correct ?
(a) PH3 is more basic than NH3
(b) PH3 is less basic than NH3
(c) PH3 is equally basic as NH3
(d) PH3 is amphoteric while NH3 is basic
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(b) The basic character decreases from NH3 to BiH3 . The basic nature is due to the presence of lone pair of electrons on the central atom. NH3 is the strongest electron pair donor due to its small size as the electron density of the electron pair is concentrated over a small region. As the size increases the electron density gets diffused over a large region and hence the ability to donate the electron pair (basic nature) decreases.
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