CBSE 2025 · Region 2 · Set 1 · Q14 · 1 mark
Assertion (A) : In Bohr model of hydrogen atom, the angular momentum of an electron in $\displaystyle \mathrm{n}^{\text {th }}$ orbit is proportional to the square root of its orbit radius $\displaystyle \mathrm{r}_{\mathrm{n}}$.
Reason (R) : According to Bohr model, electron can jump to its nearest orbits only.
Official answer
From CBSE’s own marking scheme for this paper.
(C)
If Assertion (A) is true but Reason (R) is false.
AtomsDE Broglie’s Explanation of Bohr’s Second Postulate of QuantisationAnalyseassertion_reasonmedium
More from Atoms
- The radius of the n^ th orbit in Bohr model of hydrogen atom is proportional to2023 · asked 4×
- Assertion: An alpha particle is moving towards a gold nucleus. The impact parameter is maximum for the…2024 · asked 3×
- Draw the graph showing the variation of the number (N) of scattered alpha particles with scattering angle ( θ…2022 · asked 3×
- Hydrogen atom initially in the ground state, absorbs a photon which excites it to n=5 level. The wavelength…2023 · asked 3×
- The transition of electron that gives rise to the formation of the second spectral line of the Balmer series…2024 · asked 3×
- Draw the graph showing variation of scattered particles detected ( N ) with the scattering angle ( θ ) in…2024 · asked 3×
- Energy levels A, B and C of an atom correspond to increasing values of energy i.e. E A<E B<E C. Let λ 1, λ 2…2024 · asked 3×
- In Balmer series of hydrogen atom, as the wavelength of spectral lines decreases, they appear2024 · asked 3×
CBSE Class 12 Physics past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.