Verified Solution • 2025–26 Session moderate

QJEEM25Ch634e: JEE Main 2025 Chemistry - Class 11 JEEM25Ch634e Solution: In a multielectron atom, which of the following orbitals…

In a multielectron atom, which of the following orbitals described by three quantum numbers will have same energy in absence of electric and magnetic fields?

A. n=1,l=0, m1=0\mathrm{n}=1, \mathrm{l}=0, \mathrm{~m}_1=0

B. n=2,l=0, m1=0\mathrm{n}=2, \mathrm{l}=0, \mathrm{~m}_1=0

C. n=2,I=1, m1=1\mathrm{n}=2, \mathrm{I}=1, \mathrm{~m}_1=1

D. n=3,l=2, m1=1\mathrm{n}=3, \mathrm{l}=2, \mathrm{~m}_1=1

E. n=3,l=2, m1=0\mathrm{n}=3, \mathrm{l}=2, \mathrm{~m}_1=0

Choose the correct answer from the options given below:

Multiple Choice Options

  • A B and C Only
  • B C and D Only
  • C A and B Only
  • D D and E Only

Step-by-Step Verified Solution

orbital
A:n=1,ℓ=0, mℓ=0\mathrm{A}: \mathrm{n}=1, \ell=0, \mathrm{~m}_{\ell}=0 1s
B:n=2,ℓ=0, mℓ=0\mathrm{B}: \mathrm{n}=2, \ell=0, \mathrm{~m}_{\ell}=0 2s
C:n=3,ℓ=1, mℓ=1\mathrm{C}: \mathrm{n}=3, \ell=1, \mathrm{~m}_{\ell}=1 3p
D:n=3,ℓ=2, mℓ=1\mathrm{D}: \mathrm{n}=3, \ell=2, \mathrm{~m}_{\ell}=1 3d
E:n=3,ℓ=2, mℓ=0\mathrm{E}: \mathrm{n}=3, \ell=2, \mathrm{~m}_{\ell}=0 3d

In absence of electric and magnetic fields, all orbitals of 3d are degenerate

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