NEET 2025

NEET 2025 Chemistry question on Periodic Classification

Which among the following electronic configurations belong to main group elements?
A. [Ne]3s1[\text{Ne}]3s^1
B. [Ar]3d34s2[\text{Ar}]3d^34s^2
C. [Kr]4d105s25p5[\text{Kr}]4d^{10}5s^25p^5
D. [Ar]3d104s1[\text{Ar}]3d^{10}4s^1
E. [Rn]5f06d27s2[\text{Rn}]5f^06d^27s^2
Choose the correct answer from the option given below :
  1. A.
    A, C and D only
  2. B.
    B and E only
  3. C.
    A and C only
  4. D.
    D and E only
Show answer

Correct option: C

[NEET 2025]

Practise Periodic Classification the way it is asked

A timed set of real NEET Periodic Classification questions, graded as the exam grades. No sign-up.

Start a Periodic Classification test

More: all NEET Periodic Classification questions · NEET 2025 · Chemistry chapter list