Which of the following statements are true?
(A) The subsidiary quantum number $l$ describes the shape of the orbital occupied by the electron.
(B)

is the boundary surface diagram of the $2 p_x$ orbital.
(C) The + and - signs in the wave function of the $2 \mathrm{p}_{\mathrm{x}}$ orbital refer to charge.
(D) The wave function of $2 p_x$ orbital is zero everywhere in the xy plane.

• A

  (B) and (D) only
• B

  (A), (B) and (C) only
• C

  (C) and (D) only
• Correct answer
  D

  (A) and (B) only

Solution

(A) Azimuthal quantum number $(\ell)$ indicates the shape of orbital occupied by the electron
(B)

$\mathrm{p}_{\mathrm{x}}$ orbital
(C) The + and - sign in the wave function of $2 p_x$ orbital refer to the sign (Phase) of the wave function, not the charge
(D) The wave function of $2 p_x$ orbital will be zero in yz plane (Nodal plane).

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