Q2 / 160 · TS EAMCET 2024 (10 May Shift 2) · Chemistry

Two statements are given below Statement I : In H atom, the energy of 2 s and 2 p orbitals is same Statement II : In He atom, the energy of 2 s and 2 p orbitals is same The correct answer is

  • A
    Both statements I and II are correct
  • B
    Both statements I and II are not correct
  • Correct answer
    C
    Statement I is correct but statement II-is not correct
  • D
    Statement I is not correct but statement II is correct

Solution

The energy of the orbitals in hydrogen atom increases as follows: $1 \mathrm{~s} \lt 2 \mathrm{~s}=2 \mathrm{p} \lt 3 \mathrm{~s}=3 \mathrm{p}=3 \mathrm{~d} \lt 4 \mathrm{~s}=4 \mathrm{p}=4 \mathrm{~d}=4 \mathrm{f} \lt $
The energy of an electron in a multi electron atom, unlike that of the hydrogen atom, depends not only on its principle quantum number but also on its azimuthal quantum number. So only I statement is correct.

Hence, the correct answer is option: 'C'.

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