Example 1 · difficulty 2/5
In the emission spectrum of atomic hydrogen, the wavelength of the photon released when the electron falls from n = 3 to n = 2 is nearly (R = 1.097 × 10⁷ m⁻¹):
- A. 486 nm
- B. 121.8 nm
- C. 1875 nm
- D. 656 nm
2017 source guide · Physics
NEET 2017 Physics Modern Physics Questions
Use this page to connect the official 2017 paper with current Physics practice. NeetVellum does not claim a chapter appeared in that paper until the official question and final key have been mapped.
What to master
photoelectric effect, atomic models, spectra, nuclei and radioactivity.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 2 · difficulty 1/5
A sample of hydrogen atoms is excited to the n = 5 level. As the atoms return to the ground state, the maximum number of distinct emission spectral lines that can be observed is:
- A. 4
- B. 6
- C. 10
- D. 15
Example 3 · difficulty 2/5
de Broglie offered a physical picture of Bohr's second postulate (quantisation of angular momentum). According to this interpretation, a permitted electron orbit in the hydrogen atom is one in which:
- A. the electron moves with uniform drift velocity set by the applied field
- B. the circumference of the orbit equals an integral multiple of the electron's de Broglie wavelength
- C. the orbit is an ellipse with the nucleus at its geometric centre
- D. the de Broglie wavelength keeps decreasing continuously as the electron goes round the loop
The evidence-first practice loop
- 1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
- 2. Attempt closed-bookExpose the concept or execution gap before rereading.
- 3. Repair and returnClassify the miss and re-practice after a delay.
Canonical chapter practice
Frequently asked questions
Are these official NEET 2017 Physics Modern Physics PYQs?
No. The previews are original NeetVellum practice questions. A historical item receives a PYQ label only after its official paper and authoritative final answer key are attached. Use the official archive for the source paper.
How should I use the NEET 2017 paper?
Solve the official paper under its original timing, verify against the final key, classify every miss, and then use the linked current-syllabus practice bank to repair the exposed concept.