Which is the strongest Lewis base among the f | vedclass

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(D) Lewis base is a substance that can donate a lone pair of electrons. In the group $15$ hydrides $(NH_3, PH_3, AsH_3, SbH_3)$,the central atom has o

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$NH_3$

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(D) Lewis base is a substance that can donate a lone pair of electrons. In the group $15$ hydrides $(NH_3, PH_3, AsH_3, SbH_3)$,the central atom has one lone pair of electrons. The basic strength depends on the availability of this lone pair for donation. As we move down the group,the size of the central atom increases,and the lone pair occupies a larger orbital,making it less available for donation. Additionally,the electronegativity of the central atom decreases down the group. $NH_3$ has the smallest central atom $(N)$,and the lone pair is concentrated in a smaller volume,making it the most available for donation. Therefore,$NH_3$ is the strongest Lewis base.

Which is the strongest Lewis base among the following?

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