Question

Which of the following statement is true regarding the hydrogen spectral series?

• A. Lyman series is a continuous spectrum and the wavelength range lies in the Ultraviolet region.
• B. Paschen series is a line spectrum and the wavelength range lies in the Infrared region.
• C. Balmer series is a line spectrum and the wavelength range lies in the Ultraviolet region.
• D. The spectral series formula can be derived from the Rutherford model of the atom.

Answer 1

The correct option is B Paschen series is a line spectrum and the wavelength range lies in the Infrared region.

All the spectral series in the hydrogen spectra are line spectrum. Hence, option $\left(A\right)$ is wrong.

The spectral series formula can be derived from the Bohr's model of hydrogen atom. Hence, option $\left(D\right)$ is wrong.

The following data represents the spectral series and corresponding electromagnetic spectrum region.

Lyman series - UV region
Balmer series - Visible region
Brackett series - IR region
Paschen series - IR region
Pfund series - IR region

Hence, option $\left(B\right)$ is correct.

Why this question? This question is based on spectral series of hydrogen atom.