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Chemistry · Structure of Atom

JEE Main 2025 — 7 April, Evening Shift — Question 15

The extra stability of half-filled subshell is due to :

(A) Symmetrical distribution of electrons

(B) Smaller coulombic repulsion energy

(C) The presence of electrons with the same spin in non-degenerate orbitals

(D) Larger exchange energy

(E) Relatively smaller shielding of electrons by one another

Identify the correct statements:

  1. Option A:

    (B), (D) and (E) only

  2. Option B:

    (A), (B), (D) and (E) only

    Correct
  3. Option C:

    (A), (B) and (D) only

  4. Option D:

    (B), (C) and (D) only

Answer: B

Step-by-step solution

Extra stability of half filled subshell is due to symmetrical distribution of electrons, smaller coulombic repulsion,

larger exchange energy and smaller shielding of electrons.

Answer key and solution verified before publishing.

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Exam
JEE Main 2025
Paper
7 April, Evening Shift
Subject
Chemistry
Chapter
Structure of Atom
Topic
Electronic Configuration: Rules, Aufbau Principle and Exceptions
The extra stability of half-filled subshell is due to : (A)… | JEE Main 2025 PYQ with Solution · DhiX AI