Question

Assertion : A spectral line will be observed for a $2p_x-2p_Y$ transition.
Reason : The energy is released in the form of wave of light when electron drops from $2p_x$ to $2p_y$ orbital.

• A. Both assertion and reason are true and the reason is a correct explanation of the assertion
• B. Both assertion and reason are true but reason is not a correct explanation of the assertion
• C. Assertion is true but reason is false
• D. Assertion and reason are false
• E. Assertion is false but the reason is true

Answer 1

The correct option is D Assertion and reason are false

In this case both assertion and reason are false. Both $2p_x$ and $2p_y$ orbitals have equal energy ($2p$ orbitals are degenerate), there is no possibility of electron transition and hence, no energy is released and thus, no spectral line will be observed.