Question

In the Bohr series of lines of the hydrogen spectrum, the third line from the red end corresponds to which one of the following inter-orbit jumps of the electron for Bohr orbits in an atom of hydrogen

• A. 5 → 2
• B. 4 → 1
• C. 2 → 5
• D. 3 → 2

Answer 1

The correct option is A

5 → 2

Explanation for the Correct Option:

Option (A):

• As per the given question, the lines falls in the visible spectrum.
• Hence it is suggested that the transition would be possible from the Balmer series.
• Thus for the third line, the transition states would be ${\mathrm{n}}_1=2$ and ${\mathrm{n}}_2=5$.
• Hence, this suggests the transition is from 5 → 2.

Hence, the third line from the red end corresponds to inter-orbit jumps of the electron from 5 → 2.