Question

According to Bohr's theory, which one of the following values of angular momentum of hydrogen atom is not permitted?

• A. $\frac{1.25h}{\pi }$
• B. $\frac{h}{\pi }$
• C. $\frac{1.5h}{\pi }$
• D. $\frac{0.5h}{\pi }$

Answer 1

Answer: (A)

$\frac{1.25h}{\pi }$

According to Bohr's theory, the value of angular momentum of hydrogen atom that is not permitted is $\frac{1.25h}{\pi }$.
Note: $\frac{1.25h}{\pi }=\frac{2.5h}{2\pi }$
The permitted values of angular momentum of hydrogen atom are integral multiples of $\frac{h}{2\pi }$.