NEET Physics: Atoms and Nuclei — MCQ Test 8

Q6. In a hydrogen atom, the total energy of an electron in the \( n = 3 \) state is -1.51 eV. What is its potential energy?

Q7. In the Bohr model, how many de Broglie wavelengths fit into the circumference of the \( n = 3 \) orbit?

Q8. Which of the following statements is correct about the absorption process in a hydrogen atom?

Q9. What is the orbital period of an electron in the \( n = 4 \) orbit if \( v_1 = 2.2 \times 10^6 \, \text{m/s} \) and \( r_1 = 5.3 \times 10^{-11} \, \text{m} \)?

Q10. What is a limitation of Bohr’s model when applied to the hydrogen atom’s spectrum?

NEET Physics — Atoms and Nuclei

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What is the frequency of a photon emitted when an electron drops from \( n = 2 \) to \( n = 1 \) in a hydrogen atom? (Use \( h = 6.6 \times 10^{-34} \, \text{J·s} \), 1 eV = \( 1.6 \times 10^{-19} \, \text{J} \))

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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 Frequency, Electron, Hydrogen, Assumption, Rutherford, and Contradicts.

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 frequency of a photon emitted when an electron drops from \( n = 2 \) to \( n = 1 \) in a hydrogen atom? (Use \( h = 6.6 \times 10^{-34} \, \text{J·s} \), 1 eV = \( 1.6 \times 10^{-19} \, \text{J} \))

  • A. \( 6.6 \times 10^{15} \, \text{Hz} \)
  • B. \( 1.51 \times 10^{15} \, \text{Hz} \)
  • C. \( 2.47 \times 10^{15} \, \text{Hz} \)
  • D. \( 4.4 \times 10^{15} \, \text{Hz} \)

Q2. What is the frequency of a photon emitted when an electron drops from \( n = 3 \) to \( n = 1 \) in a hydrogen atom? (Use \( h = 6.6 \times 10^{-34} \, \text{J·s} \), 1 eV = \( 1.6 \times 10^{-19} \, \text{J} \))

  • A. \( 6.6 \times 10^{15} \, \text{Hz} \)
  • B. \( 1.51 \times 10^{15} \, \text{Hz} \)
  • C. \( 2.93 \times 10^{15} \, \text{Hz} \)
  • D. \( 4.4 \times 10^{15} \, \text{Hz} \)

Q3. What assumption in Rutherford’s model contradicts classical electromagnetic theory?

  • A. Nucleus is small
  • B. Atom is mostly empty
  • C. Electrons orbit without radiating
  • D. Positive charge is concentrated

Q4. In Bohr’s model, what happens to the energy required to ionize a hydrogen atom as the electron’s orbit number increases?

  • A. Increases
  • B. Remains constant
  • C. Becomes infinite
  • D. Decreases

Q5. In Rutherford’s scattering experiment, what causes the large deflection of some alpha-particles?

  • A. Interaction with electrons
  • B. Repulsion by the nucleus
  • C. Absorption by the foil
  • D. Magnetic field effects

+ 5 more questions in the actual test

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