Bond angle in PH+4 is higher than that i | Class 12 Chemistry Chapter The p-Block Elements, The p-Block Elements NCERT Solutions

Question:

Bond angle in PH+4 is higher than that in PH3. Why?

Answer:

PH3 (Phosphine) is a hydride of Phosphorus. Phosphine is a gas and has pyramidal structure. Phosphorus involved is sp3 hybridized.

Now both PH4+ and PH3 have sp3 hybridization 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 PH3 is about 93.6°.


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Comments

  • Mandavi
  • 2019-02-17 14:15:55

Nicely explained


Comment(s) on this Question

Welcome to the NCERT Solutions for Class 12 Chemistry - Chapter . This page offers a step-by-step solution to the specific question from Excercise 1 , Question 7: Bond angle in PH+4 is higher than that in PH3. Why?....