P Block — Medium JEE chemistry MCQ
**[JEE Mains 2026]** Two elements of p-block can form halides XF₅ and YF₃. XF₅ can act as a Lewis acid while YF₃ can act as a Lewis base. What is the hybridization of 'X' in XF₅ and 'Y' in YF₃ respectively?
- A. sp³d, sp³
- B. sp³d², sp³d
- C. sp³d, sp³d
- D. sp³d², sp³
Solution
XF₅ acts as Lewis acid (electron acceptor), so X has empty orbitals.
Examples: PF₅, AsF₅ with sp³d hybridization.
YF₃ acts as Lewis base (electron donor), having a lone pair.
Example: NF₃ with sp³ hybridization.
Hybridization: X = sp³d, Y = sp³.