Question

Which of the following set of radiations can not be seen in hydrogen atomic spectrum?
(i) $\gamma$ - radiation
(ii) UV
(iii) X-rays
(iv) Infrared

• A. (i), (iii), (iv)
• B. (iii), (iv)
• C. (i), (iii)
• D. (i),(iv)

Answer 1

Answer: (C)

In hydrogen atomic spectra the five series have frequency range as:

Lyman series $\rightarrow$ UV region

Balmer series $\rightarrow$ Visible region

Paschen series $\rightarrow$ IR region

Brackett series $\rightarrow$ for IR region

Pfund series $\rightarrow$ IR region