NEET Physics: Atoms and Nuclei — MCQ Test 2

Q6. An electron in a hydrogen atom has an angular momentum of \( 1.05 \times 10^{-34} \, \text{J·s} \). What is its principal quantum number? (Use \( h = 6.6 \times 10^{-34} \, \text{J·s} \))

Q7. Which of the following statements is correct about the Bohr model’s prediction of hydrogen spectra?

Q8. An electron beam of 11.0 eV excites a hydrogen atom in the ground state. What is the highest energy level reached? (Use \( E_n = -\frac{13.6}{n^2} \, \text{eV} \))

Q9. In a hydrogen atom, the radius of the first orbit is \( 5.3 \times 10^{-11} \, \text{m} \). What is the circumference of the third orbit?

Q10. What is the ratio of the radius of the \( n = 4 \) orbit to the \( n = 2 \) orbit in a hydrogen atom?

NEET Physics — Atoms and Nuclei

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What is the total energy of an electron in the \( n = 2 \) state of a hydrogen atom? (Use \( E_n = -\frac{13.6}{n^2} \, \text{eV} \))

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About this NEET MCQ Test

This page provides a free online MCQ test for NEET Physics preparation, focusing specifically on the chapter Atoms and Nuclei. It contains 10 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.

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Key concepts covered in this specific test include Electron, Hydrogen, Significance, Negative, According, and Required.

Taking these timed MCQ tests helps you simulate the real NEET exam environment. Detailed step-by-step explanations are provided for every question to help you learn from your mistakes and strengthen your fundamentals.

Preview of Questions in this Test

Q1. What is the total energy of an electron in the \( n = 2 \) state of a hydrogen atom? (Use \( E_n = -\frac{13.6}{n^2} \, \text{eV} \))

  • A. -13.6 eV
  • B. -6.8 eV
  • C. -3.4 eV
  • D. -1.51 eV

Q2. What is the significance of the negative total energy of an electron in a hydrogen atom according to Bohr’s model?

  • A. Electron is bound to the nucleus
  • B. Electron moves freely in space
  • C. Electron emits continuous radiation
  • D. Electron has zero kinetic energy

Q3. A hydrogen atom is excited to the \( n = 4 \) state and returns to the ground state. What is the maximum energy of the emitted photon? (Use \( E_n = -\frac{13.6}{n^2} \, \text{eV} \))

  • A. 10.2 eV
  • B. 2.55 eV
  • C. 1.89 eV
  • D. 12.75 eV

Q4. What is the energy required to excite a hydrogen atom from \( n = 1 \) to \( n = 3 \)? (Use \( E_n = -\frac{13.6}{n^2} \, \text{eV} \))

  • A. 10.2 eV
  • B. 1.89 eV
  • C. 12.09 eV
  • D. 2.55 eV

Q5. In Rutherford’s scattering experiment, what happens to an alpha-particle with a large impact parameter?

  • A. Rebounds back
  • B. Scatters at 90°
  • C. Goes nearly undeviated
  • D. Stops completely

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