Assertion : Atomic orbitals having same or nearly the same energy will not combine if they do not have the same symmetry Reason : During L.C.A.O. 2p z orbital of one atom can combine with 2p z orbital

Question

Assertion : Atomic orbitals having same or nearly the same energy will not combine if they do not have the same symmetry

Reason : During L.C.A.O. 2p_z orbital of one atom can combine with 2p_z orbital of the other atom but not with the 2p_x or 2p_yorbitals of other atom (If internuclear axis is taken to be in x-direction).

TestHub · Accepted Answer

Assertion is true: Atomic orbitals must have compatible symmetry and similar energy to combine effectively. Reason is also true: 2 p z ​ orbitals combine with 2 p z ​ (sigma bond) but not 2 p x ​ or 2 p y ​ (pi bonds) if the internuclear axis is x-direction, due to symmetry mismatch. However, the Reason describes a specific case of symmetry, not a general explanation for why symmetry is required.

Chemistry - CHEMICAL BONDING Question with Solution | TestHub

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