JEE Main 2024

Question

Given below are two statements:
**Statement (I)** : The orbitals having same energy are called as degenerate orbitals.
**Statement (II)** : In hydrogen atom, $3p$ and $3d$ orbitals are not degenerate orbitals.
In the light of the above statements, choose the most appropriate answer from the options given below: A). Statement I is true but Statement II is false. B). Both Statement I and Statement II are true. C). Both Statement I and Statement II are false. D). Statement I is false but Statement II is true.

Edvaya · Accepted Answer

The correct answer is Statement I is true but Statement II is false.. **Solution:** Statement I is true: Orbitals belonging to the same subshell or having the identical energy level are called degenerate orbitals. Statement II is false: In a single-electron species like the hydrogen atom, the energy of an orbital depends solely on the principal quantum number ($n$). Therefore, the $3s, 3p,$ and $3d$ orbitals all have the same energy level and are degenerate. Subshell energy splitting ($s < p < d$) only occurs in multi-electron systems due to electron-electron repulsion and shielding.

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Chemistry > Physical Chemistry > Atomic Structure

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