Question

Which of the following is NOT correct in hybridisation?

• A. There should be very little difference in energy of involving orbitals
• B. The shape of hybrid orbitals is same as that of atomic orbitals
• C. The number of hybrid orbitals formed is equal to number of atomic orbitals involved in hybridisation
• D. Orbitals of an atom only undergo hybridisation

Hint:

Hybrid orbitals are more directional than atomic orbitals, leading to specific molecular geometries.

Answer 1

The Correct Option is B

Step 1: Understanding hybridisation.
Hybridisation is the intermixing of atomic orbitals of comparable energies to form new hybrid orbitals with equivalent energy and definite geometry.

Step 2: Evaluating each statement.
(A) This is correct because only orbitals with nearly the same energy can hybridise.
(B) This is incorrect because hybrid orbitals have different shapes compared to pure atomic orbitals; they are more directional.
(C) This is correct since the number of hybrid orbitals formed equals the number of atomic orbitals mixed.
(D) This is correct as hybridisation occurs only within orbitals of the same atom.

Step 3: Conclusion.
Thus, option (B) is NOT correct in hybridisation.