Question

The figure shows an energy level diagram for the hydrogen atom. Several transitions are marked as `I, II, III` `",______,"` the diagram is only indicative and not to scale.
.
Which transition involves the longest wavelength line in the visible portion of the hydrogen spectrum
A. II
B. III
C. VI
D. IV

Answer 1

Correct Answer - D
For longest wavelength, energy difference should be minimum. So in visible portion of hydrogen atom, minimum energy is in transition VI & IV.