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Which of the following is/are not correct with respect to energy of atomic orbitals of hydrogen atom? (A) 1s < 2p < 3d < 4s (B) 1s < 2s = 2p < 3s = 3p (C) 1s < 2s < 2p < 3s < 3p (D) 1s < 2s < 4s < 3d Choose the correct answer from the options given below : (1) (B) and (D) only (2) (A) and (C) only (3) (C) and (D) only (4) (A) and (B) only

1. (B) and (D) only
2. (A) and (C) only
3. (C) and (D) only
4. (A) and (B) only

Correct answer: (C) and (D) only

Solution

Options (C) and (D) are incorrect because they misrepresent the energy levels of atomic orbitals; specifically, the 4s orbital is lower in energy than the 3d orbital, and the 2s and 2p orbitals are not equal in energy.

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