Question 141: Atoms & Nuclei

Question

Given below are two statements :
Statement (I) : The dimensions of Planck's constant and angular momentum are same.
Statement (II) : In Bohr's model electron revolve around the nucleus only in those orbits for which angular momentum is integral multiple of Planck's constant.
In the light of the above statements, choose the most appropriate answer from the options given below :

Accepted Answer

$$\begin{aligned}
&\begin{aligned}
& \mathrm{E}=\mathrm{hf} \
& \mathrm{ML}^2 \mathrm{~T}^{-2}=[\mathrm{h}] 	imes\left[\mathrm{T}^{-1}ight] \
& {[\mathrm{h}]=\left[\mathrm{ML}^2 \mathrm{~T}^{-1}ight]} \
& \mathrm{L}=[\mathrm{MVR}]=\left[\mathrm{ML}^2 \mathrm{~T}^{-1}ight] \
& \mathrm{L}=\frac{\mathrm{nh}}{2 \pi}
\end{aligned}\
&\mathrm{L} 	ext { is integral multiple of } \frac{\mathrm{h}}{2 \pi}
\end{aligned}$$

Answer

Both Statement I and Statement II are correct

Answer

Statement I is correct but Statement II is incorrect

Answer

Both Statement I and Statement II are incorrect

Answer

Statement I is incorrect but Statement II is correct

Atoms & Nuclei

Choose the correct answer: