Q.

Given below are two statements:
Statement I: PF5 and BrF5 both exhibit sp3d hybridisation.
Statement II: Both SF6 and [Co(NH3)6]3+ exhibit sp3d2 hybridisation.

In the light of the above statements, choose the correct answer from the options given below:                 [2024]

1 Statement I is true but Statement II is false  
2 Both Statement I and Statement II are false  
3 Both Statement I and Statement II are true  
4 Statement I is false but Statement II is true  

Ans.

(2)

s and p block elements with C.N. = 6 exhibit sp3d2 hybridization.

[Co(NH3)6]3+

Oxidation number of Co = +3

Co3+=[18Ar]3d6

Co3+ complexes with CN = 6 split as t2g2,2,2 eg0,0 and undergo d2sp3 hybridization.