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Q.

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 :

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a

(A) and (C) only

b

(A) and (B) only

c

(B) and (D) only

d

(C) and (D) only

answer is C.

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Detailed Solution

For single electron species energy only depends on 'n' (principal quantum number)
So energy of 2s = 2p
and energy of 3d < 4s

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