Question

Which is correct statement ?
As the s-character of a hybrid orbital decreases
(I) The bond angle decreases
(II) The bond strength increases
(III) The bond length increases
(IV) Size of orbitals increases

• A. (I), (III) and (IV)
• B. (II), (III) and (IV)
• C. (I) and (II)
• D. All are correct

Answer 1

The correct option is A (I), (III) and (IV)

According to Bent's rule, as the substituent electronegativies increase, orbitals of greater p character will be directed towards those groups. By the above, this will decrease the bond angle.
as bonding orbitals increase in s character, the bond length decreases. By adding electronegative substituents and changing the hybridisation of the central atoms, bond lengths can be manipulated.