For the electrons of oxygen atom, which of the following st…

Chemistry Structure of Atom NCERT Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 14, 2026

For the electrons of oxygen atom, which of the following statements is incorrect?

Zeff for an electron in a 2 s ‐ orbital is greater than the Zeff for an electron in a 2 p ‐ orbital.

An electron in the 2 s ‐ orbital has lesser energy as an electron in the 2 p ‐ orbital.

Zeff for an electron is ls ‐ orbital is different from that of an electron in 2 s ‐ orbital.

The two electrons present in the 2 s ‐ orbital have different quantum number values with same sign.

Text Solution

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The correct answer is:

The two electrons present in the ‐ orbital have same spin quantum numbers value but of opposite sign.

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