NEET Chemistry The p-Block Elements (XII) Questions Solved

The formation of PH+4 is difficult compared to NH+4 because

(1) lone pair of phosphorous is optically inert

(2) lone pair of phosphorous resides in almost pure p- orbital

(3) lone pair of phosphorous resides at sp3 orbital

(4) lone pair of phosphorous resides in almost pure s- orbital

(4) PH3..+H+ PH+4

According to Drago's rule lone pair on phosphorous resides in almost pure s- orbital, hence due to non directional nature, its overlapping tendency is greatly reduced in comparison to a lone pair present in hybrid orbital, which is directional as present in NH3..

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