Learn

Friday, 9 October

NEET UG 2023 · Chemistry · Question 78

NEET 2023 Chemistry, question 78

Question 78 of the NEET 2023 paper (code G6) is a Chemistry question from Structure of Atom. Its idea, Magnetic Quantum Number (ml), was asked only this once in NEET 2017–2026. The NTA final answer key gives option 2.

Updated 2026-10-08

Q78 · Chemistry

The relation between nmn_m, (nmn_m = the number of permissible values of magnetic quantum number (m)) for a given value of azimuthal quantum number (ll), is

  1. 1nm=l+2n_m=l+2
  2. 2l=nm−12l=\frac{n_m-1}{2}Official answer
  3. 3l=2nm+1l=2n_m+1
  4. 4nm=2l2+1n_m=2l^2+1

Official answer: option 2 · NTA final answer key

Same idea

The only question on Magnetic Quantum Number (ml)

No other NEET paper from 2017–2026 tested this exact idea.

Magnetic Quantum Number (ml): every question and how it was framed

The chapter

Structure of Atom in ten years of NEET

16 questions from 2017–2026, asked in 10 of 10 papers, about 1.5 a paper. Quantum Numbers alone had 16.

Structure of Atom: questions per paper

0241’171’182’191’202’212’222’232’242’251’26