✓ Board-verified
Physics · 2025 · 1 mark
AtomsDE Broglie’s Explanation of Bohr’s Second Postulate of Quantisation1 markAnalyseassertion reason
CBSE 2025 · Region 2 · Set 1 · Q14
Assertion (A): In Bohr model of hydrogen atom, the angular momentum of an electron in n^th orbit is proportional to the square root of its orbit…
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
(C)
If Assertion (A) is true but Reason (R) is false.
More from Atoms
- Define the term - Distance of closest approach. How will it be affected, for an α - particle, if kinetic energy of the particle is doubled?2022
- Define the'distance of closest approach'. An α -particle of kinetic energy K is bombarded on a thin gold foil. Derive an expression for the'distance…2025
- State Bohr's postulate to explain stable orbits in a hydrogen atom. Prove that the speed with which the electron revolves in n^th orbit is…2022
- In Bohr's model of hydrogen atom, find the percentage change in the radius of its orbit when an electron makes a transition from n=3 state to n=2…2025
- Calculate the de Broglie wavelength associated with an electron revolving in the second excited state of hydrogen atom. The ground state energy of…2026
- State Bohr's first and second postulates. Use them to derive an expression for the radius of the n^th orbit in a hydrogen atom.2024
- Assertion: An alpha particle is moving towards a gold nucleus. The impact parameter is maximum for the scattering angle of 180^°. Reason (R): The…2024
- The radius of the n^th orbit in Bohr model of hydrogen atom is proportional to2023
CBSE Class 12 Physics past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.