NTA Abhyas NEET2020ChemistryChemical Bonding and Molecular StructurePractice
Which of the following statements is/are true? (i) PH 5 and BiCl 5 do not exist (ii) p π - d π bond is present in SO 2 (iii) I 3 + has bent geometry (iv) SeF 4 and CH 4 have same shape
Options
- A(i), (ii), (iii)
- B(i), (iii)
- C(i), (iii), (iv)
- D(i), (ii), (iv)
Correct answer
A. (i), (ii), (iii)
Step-by-step solution
(i) PH 5 does not exist because the electronegativity of H & P are almost same they should have sp 3 d hybridised but the H cannot distort the d orbital of P hence it is not exist while BiCl 5 Bi + 3 is more stable than Bi + 3 due to inert inert pair effect and in BiCl 5 steric crowding also present so it does not exist. (ii) S = 1 s 2 2 s 2 2 p 6 3 s 2 3 p 4 3 d 0 In exicited state p & d orbital of sulphur & p orbital of oxygen involved in π bond so SO 2 has pπ − dπ bond (iii) I 3 + 2b p + 2l p = sp 3 hybridisatio