NEET Physics: Atoms and Nuclei — MCQ Test 6

Q6. What is the angular momentum of an electron in the \( n = 5 \) state of a hydrogen atom? (Use \( h = 6.6 \times 10^{-34} \, \text{J·s} \))

Q7. What is the wavelength of a photon emitted when an electron drops from \( n = 4 \) to \( n = 3 \) in a hydrogen atom? (Use \( h = 6.6 \times 10^{-34} \, \text{J·s} \), \( c = 3 \times 10^8 \, \text{m/s} \), 1 eV = \( 1.6 \times 10^{-19} \, \text{J} \))

Q8. How many de Broglie wavelengths fit into the circumference of the \( n = 4 \) orbit of a hydrogen atom?

Q9. A hydrogen atom in the \( n = 5 \) state emits a photon and returns to the ground state. What is the maximum energy of the photon? (Use \( E_n = -\frac{13.6}{n^2} \, \text{eV} \))

Q10. The radius of the third orbit in a hydrogen atom is how many times the radius of the first orbit if \( r_1 = 5.3 \times 10^{-11} \, \text{m} \)?

NEET Physics — Atoms and Nuclei

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In Rutherford’s model, what is the primary force keeping electrons in orbit around the nucleus?

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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 Rutherford, Electrons, Potential, Electron, Hydrogen, and Following.

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. In Rutherford’s model, what is the primary force keeping electrons in orbit around the nucleus?

  • A. Gravitational force
  • B. Magnetic force
  • C. Nuclear force
  • D. Electrostatic force

Q2. What is the ratio of the kinetic energy to the potential energy of an electron in the ground state of a hydrogen atom? (Given total energy = -13.6 eV)

  • A. 0.5
  • B. 1
  • C. 2
  • D. -0.5

Q3. The radius of the first orbit in a hydrogen atom is \( 5.3 \times 10^{-11} \, \text{m} \). What is the radius of the second orbit?

  • A. \( 2.12 \times 10^{-10} \, \text{m} \)
  • B. \( 1.06 \times 10^{-10} \, \text{m} \)
  • C. \( 4.24 \times 10^{-10} \, \text{m} \)
  • D. \( 5.3 \times 10^{-11} \, \text{m} \)

Q4. A hydrogen atom absorbs a photon and jumps from \( n = 1 \) to \( n = 2 \). What is the energy of the photon? (Use \( E_n = -\frac{13.6}{n^2} \, \text{eV} \))

  • A. 13.6 eV
  • B. 10.2 eV
  • C. 3.4 eV
  • D. 1.51 eV

Q5. Which of the following statements is correct about the energy levels in a hydrogen atom according to Bohr’s model?

  • A. Energy decreases with increasing \( n \)
  • B. Energy increases with increasing \( n \)
  • C. Energy is constant for all orbits
  • D. Energy is zero in the ground state

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