7.7 Bond angle in PH₄ + is higher than that in PH₃. Why? 

7.7 Hybridisation of P in PH₃ is sp³. Out of the four sp³ hybrid orbitals, three are involved in bonding with the three H-atoms and the fourth one has a lone pair in it.

PH₃ when combines with a proton, it forms PH ⁺ in which the lone pair is absent. So, here all the four hybrid orbitals are involved in bonding.

Now; the lone pair- bond-pair repulsion is stronger than the corresponding bond pair-bond pair repulsion; thus, the tetrahedral shape associated with sp³ bonding in PH₃ is changed to pyramidal and due to the absence of lone pair in PH₄⁺, there is no lone pair-bond pair repulsion. Hence; the bond angle in PH₄⁺ is higher than the b

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7.7 Hybridisation of P in PH₃ is sp³. Out of the four sp³ hybrid orbitals, three are involved in bonding with the three H-atoms and the fourth one has a lone pair in it.

PH₃ when combines with a proton, it forms PH ⁺ in which the lone pair is absent. So, here all the four hybrid orbitals are involved in bonding.

Now; the lone pair- bond-pair repulsion is stronger than the corresponding bond pair-bond pair repulsion; thus, the tetrahedral shape associated with sp³ bonding in PH₃ is changed to pyramidal and due to the absence of lone pair in PH₄⁺, there is no lone pair-bond pair repulsion. Hence; the bond angle in PH₄⁺ is higher than the bond angle in PH₃.

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<p><strong>7.7</strong> Hybridisation of P in PH₃ is sp³. Out of the four sp³ hybrid orbitals, three are involved in bonding with the three H-atoms and the fourth one has a lone pair in it.</p><p>PH₃ when combines with a proton, it forms PH ⁺ in which the lone pair is absent. So, here all the four hybrid orbitals are involved in bonding.</p><p>Now; the lone pair- bond-pair repulsion is stronger than the corresponding bond pair-bond pair repulsion; thus, the tetrahedral shape associated with sp³ bonding in PH₃ is changed to pyramidal and due to the absence of lone pair in PH₄⁺, there is no lone pair-bond pair repulsion. Hence; the bond angle in PH₄⁺ is higher than the bond angle in PH₃.</p><div><div><picture><source srcset="https://images.shiksha.com/mediadata/images/articles/1688024139phpqKmG1L_480x360.jpeg" media=" (max-width: 500px)"><img src="https://images.shiksha.com/mediadata/images/articles/1688024139phpqKmG1L.jpeg" alt="" width="258" height="127"></picture></div></div>

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