MCQ
In a multi-electron atom, which of the following orbitals described by the three quantum members will have the same energy in the absence of magnetic and electric fields

$(1)$ $n = 1,\,l = 0,\,m = 0$

$(2)$ $n = 2,\,l = 0,\,m = 0$

$(3)$ $n = 2,\,l = 1,\,m = 1$

$(4)$ $n = 3,\,l = 2,\,m = 0$

$(5)$ $n = 3,\,l = 2,\,m = 0$

  • A
    $(1) $ and $(2)$
  • B
    $(2) $ and $(3)$
  • C
    $(3) $ and $(4)$
  • $(4)$ and $ (5)$

Answer

Correct option: D.
$(4)$ and $ (5)$
d
(d) $(4)$  and $(5)$ belong to $d$-orbital which are of same energy.

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