Short Answer Type Questions -IIBond angle in PH: is higher than in PH3

1.	Short Answer Type Questions -IIBond angle in PH: is higher than in PH3-Why?
Answer» PH3(Phosphine) is a hydride of Phosphorus. Phosphine is a gas and has pyramidal structure. Phosphorus involved is sp3hybridized. Now both PH4+and PH3have sp3hybridization state for phosphorous .In PH4+,all the four orbitals are bonded, whereas in PH3,there is a lone pair of electrons on Phosphorous .In PH4+, the HPH bond angle is tetrahedral angle of 109.5°.But in PH3,lone pair- bond pair repulsion is more than bond pair-bond pair repulsion so that bond angles become less than normal tetrahedral angle .The bond angle in PH3is about 93.6°.

Short Answer Type Questions -IIBond angle in PH: is higher than in PH3-Why?

Answer»

PH3(Phosphine) is a hydride of Phosphorus. Phosphine is a gas and has pyramidal structure. Phosphorus involved is sp3hybridized.

Now both PH4+and PH3have sp3hybridization state for phosphorous .In PH4+,all the four orbitals are bonded, whereas in PH3,there is a lone pair of electrons on Phosphorous .In PH4+, the HPH bond angle is tetrahedral angle of 109.5°.But in PH3,lone pair- bond pair repulsion is more than bond pair-bond pair repulsion so that bond angles become less than normal tetrahedral angle .The bond angle in PH3is about 93.6°.

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