Arrange the hydrides of Group 15 elements in | vedclass

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Question

(B) The basic strength of the hydrides of Group $15$ elements depends on the availability of the lone pair of electrons on the central atom.As we move

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$BiH_3 < SbH_3 < AsH_3 < PH_3 < NH_3$

Vedclass · Answer

(B) The basic strength of the hydrides of Group $15$ elements depends on the availability of the lone pair of electrons on the central atom.As we move down the group from $N$ to $Bi$,the atomic size increases.Due to the increase in size,the lone pair of electrons is spread over a larger volume,which decreases the electron density.Therefore,the tendency to donate the lone pair decreases,and the basic strength decreases.The order of basic strength is: $NH_3 > PH_3 > AsH_3 > SbH_3 > BiH_3$.

Arrange the hydrides of Group $15$ elements in the increasing order of their basic strength.

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