JEE MAIN - Chemistry (2025 - 24th January Evening Shift - No. 19)

For hydrogen atom, the orbital/s with lowest energy is/are :

(A) $\mathrm{4 s}$

(B) $3 \mathrm{p}_x$

(D) $3 \mathrm{~d}_{z^2}$

(E) $4 \mathrm{p}_z$

Choose the correct answer from the options given below :

(A) only

(B) only

(B), (C) and (D) only

(A) and (E) only

In hydrogen atom the orbitals in a shell are degenerate means energy depends only on ' $n$ '

$$\therefore \mathrm{E}_{3 \mathrm{p}_{\mathrm{x}}}=\mathrm{E}_{3 \mathrm{~d}_{x^2-y^2}}=\mathrm{E}_{3 \mathrm{~d}_{z^2}}$$