Question

Assertion: A special line will be seen for the 2px−2py transition.

Reason: Energy is released in the form of a wave of light when the electron drops from 2px to −2py orbital.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is D Both Assertion and Reason are incorrect

Both $2p_x$ and $2p_y$ are orbitals of $\mathrm{the\; 2}p$ subshell. All the orbitals of a subshell are degenerate i.e., have same energy, thus when an electron moves from $2p_x$ to $2p_y$, no energy is emitted hence no line is seen. Thus both assertion and reason are incorrect.