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NCERT Class XII Chemistry
Chapter - The p-Block Elements
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Question : 47
Total: 74
Bond angle in PH4+ is higher than in PH3. Why?
Solution:  
Both are sp3hybridised. In PH4+all the four orbitals are bondedwhereas in PH3 there is a lone pair of electrons on P, which is responsiblefor lone pair-bond pair repulsion in PH3 reducing the bond angle to lessthan 109° 28′.
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