Hydrogen Spectra

Q. If an electron in a hydrogen atom jumps from the 3rd orbit to the 2nd orbit, it emits a photon of wavelength $\lambda$. When it jumps from the 4th orbit to the 3rd orbit, the corresponding wavelength of the photon will be

1. $\frac{20}{13}\lambda$
2. $\frac{16}{25}\lambda$
3. $\frac{9}{16}\lambda$
4. $\frac{20}{7}\lambda$

Q.

Whenever a hydrogen atom emits a photon in the Balmer series

1. It need not emit any more photon

2. It may emit another photon in the Paschen series

3. It must emit another photon in the Lyman series

4. It may emit another photon in the Balmer series

Q. If an electron in a hydrogen atom jumps from the 3rd orbit to the 2nd orbit, it emits a photon of wavelength $\lambda$. When it jumps from the 4th orbit to the 3rd orbit, the corresponding wavelength of the photon will be

1. $\frac{20}{13}\lambda$
2. $\frac{16}{25}\lambda$
3. $\frac{9}{16}\lambda$
4. $\frac{20}{7}\lambda$

Q.

Match the series with its corresponding $n_1$ value in the Rydberg's Formula

$\begin{array}{cc}A.Paschen& i)2\\ B.Lyman& ii)1\\ C.Balmer& iii)3\\ D.Pfund& iv)5\\ E.Brackett& v)4\end{array}$

1. a-iii ; b - ii; c - i ; d- iv; e - v

2. a-v ; b - i; c - iv ; d- ii; e - iii

3. a-iv ; b - iii; c - v ; d- i; e - ii

4. a-i ; b - v; c - ii ; d- iii; e - v

Q. Which one of the series of hydrogen spectrum is in the visible region

1. Lyman series
2. Balmer series
3. Paschen series
4. Bracket series

Q. The ratio of wave length of first line of Lyman series to the first line of Balmer series is

1. 1 : 4
2. 5 : 27
3. 27 : 20
4. 20 : 27