Question

In the following figure the energy levels of hydrogen atom have been shown along with some transitions as marked $A,B,C,D$ and $E$. The transitions $A,B$ and $C$ respectively represent :

• A. The first member of Lyman series, third member of Balmer series and second member of Paschen series.
• B. The ionisation potential of hydrogen, second member of Balmer series and third member of Paschen series.
• C. The series limit of Lyman series, second member of Balmar series and second member of Paschen series.
• D. The series limit of Lyman series, third member of Balmer series and second member of Paschen series.

Answer 1

The correct option is D The series limit of Lyman series, third member of Balmer series and second member of Paschen series.

Transition $A$ is corresponding to infinity to $n=1$ which is the last line (series limit) of Lyman series, transition $B$ is from $n=5$ to $n=2$ which is third line of Balmer series and transition $C$ is from $n=5$ to $n=3$ which is second line of Paschen series.