NEET Chemistry: Structure of Atom — MCQ Test 17

Q6. The ionization energy of a hydrogen atom is \( 13.6 \, \text{eV} \). What is the wavelength of the photon emitted when an electron in \( \text{Li}^{2+} \) falls from \( n = 5 \) to \( n = 2 \)? (\( h = 6.626 \times 10^{-34} \, \text{J s} \), \( c = 3.0 \times 10^8 \, \text{m s}^{-1} \), \( 1 \, \text{eV} = 1.6 \times 10^{-19} \, \text{J} \))

Q7. A metal has a threshold wavelength of \( 450 \, \text{nm} \). What is the kinetic energy of an electron ejected by light of wavelength \( 300 \, \text{nm} \)? (\( h = 6.626 \times 10^{-34} \, \text{J s} \), \( c = 3.0 \times 10^8 \, \text{m s}^{-1} \))

Q8. The number of electrons in an atom with quantum numbers \( n = 4, l = 1, m_l = 0 \) is:

Q9. An electron in the second orbit of \( \text{He}^+ \) has a velocity of \( 2.19 \times 10^6 \, \text{m s}^{-1} \). What is its de Broglie wavelength? (\( h = 6.626 \times 10^{-34} \, \text{J s} \), \( m_e = 9.1 \times 10^{-31} \, \text{kg} \))

Q10. The threshold frequency for a metal is \( 6.0 \times 10^{14} \, \text{Hz} \). What is the work function in joules? (\( h = 6.626 \times 10^{-34} \, \text{J s} \))

NEET Chemistry — Structure of Atom

Free MCQ Test 17 of 20

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What is the maximum number of electrons that can occupy the subshell with principal quantum number \( n = 2 \) and azimuthal quantum number \( l = 1 \)?

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About this NEET MCQ Test

This page provides a free online MCQ test for NEET Chemistry preparation, focusing specifically on the chapter Structure of Atom. 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 Electrons, Subshell, Principal, Azimuthal, Wavelength, and Electron.

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 maximum number of electrons that can occupy the subshell with principal quantum number \( n = 2 \) and azimuthal quantum number \( l = 1 \)?

  • A. 2
  • B. 6
  • C. 10
  • D. 4

Q2. A photon of wavelength \( 200 \, \text{nm} \) ejects an electron from a metal with a velocity of \( 6.62 \times 10^5 \, \text{m s}^{-1} \). What is the work function of the metal? (\( h = 6.626 \times 10^{-34} \, \text{J s} \), \( c = 3.0 \times 10^8 \, \text{m s}^{-1} \), \( m_e = 9.1 \times 10^{-31} \, \text{kg} \))

  • A. \( 7.945 \times 10^{-19} \, \text{J} \)
  • B. \( 9.939 \times 10^{-19} \, \text{J} \)
  • C. \( 1.994 \times 10^{-19} \, \text{J} \)
  • D. \( 5.963 \times 10^{-19} \, \text{J} \)

Q3. The number of spectral lines produced when an electron in a hydrogen atom falls from \( n = 5 \) to \( n = 2 \) is:

  • A. 3
  • B. 5
  • C. 6
  • D. 4

Q4. What is the wavelength of the second line in the Balmer series of a hydrogen atom? (\( R_H = 1.097 \times 10^7 \, \text{m}^{-1} \))

  • A. \( 656.3 \, \text{nm} \)
  • B. \( 410.2 \, \text{nm} \)
  • C. \( 121.6 \, \text{nm} \)
  • D. \( 486.1 \, \text{nm} \)

Q5. The velocity of an electron in the second orbit of a hydrogen atom is \( 1.095 \times 10^6 \, \text{m s}^{-1} \). What is its de Broglie wavelength in this orbit? (\( h = 6.626 \times 10^{-34} \, \text{J s} \), \( m_e = 9.1 \times 10^{-31} \, \text{kg} \))

  • A. \( 6.65 \times 10^{-10} \, \text{m} \)
  • B. \( 3.33 \times 10^{-10} \, \text{m} \)
  • C. \( 9.98 \times 10^{-10} \, \text{m} \)
  • D. \( 1.66 \times 10^{-10} \, \text{m} \)

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