Question

The energy levels of the hydrogen spectrum is shown in figure.

Transitions $A, B$ and $C$ represent

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

Answer 1

Answer: (C)

Transition $A ; n=\infty$ to $n=1$, series limit of Lyman series.
Transition $B ; n=5$ to $n=2$, third spectral line of Balmer series.
Transition $C ; n=5$ to $n=3$, second spectral line of Paschen series.