JEE Chemistry 2024 Question with Solution

Given: The question asks the conditions under which atomic orbitals combine through the linear combination of atomic orbitals to form molecular orbitals.

Find: The most appropriate correct option.

From the solution text, effective combination requires:

• atomic orbitals to have the same or very similar energy
• atomic orbitals to have the same symmetry about the molecular axis
• effective overlap should be significant, so minimum overlap is not correct

Thus, statements A and C are correct, while B and D are incorrect.

However, the provided options are listed as four separate statements, whereas the solution concludes A and C only and also shows "The Correct Option is B". This indicates a source-format discrepancy between the option layout and the answer key.

Therefore, based on the solution working, the correct conclusion is A and C only, but it cannot be mapped unambiguously to a single displayed option.

Given: Conditions for formation of molecular orbitals using LCAO.

Find: Which listed statements are correct.

1. A. have the same energy — correct, because atomic orbitals combine effectively when their energies are equal or nearly equal.
2. B. have the minimum overlap — incorrect, because effective molecular orbital formation requires appreciable overlap, not minimum overlap.
3. C. have the same symmetry about the molecular axis — correct, because compatible symmetry is necessary for combination.
4. D. have different symmetry about the molecular axis — incorrect, because orbitals of different symmetry do not combine effectively.

Therefore, the correct set is A and C only. The solution's’s displayed single-letter key does not match the displayed statement-wise options.