NEET Chemistry: Structure of Atom — MCQ Test 4

Q6. A metal has a threshold frequency of \( 5.5 \times 10^{14} \, \text{Hz} \). What is the stopping potential when irradiated with light of frequency \( 8.0 \times 10^{14} \, \text{Hz} \)? (\( h = 6.626 \times 10^{-34} \, \text{J s} \), \( e = 1.6 \times 10^{-19} \, \text{C} \))

Q7. The ionization energy of \( \text{Be}^{3+} \) from its ground state is how many times that of a hydrogen atom? (\( E_H = 13.6 \, \text{eV} \))

Q8. What is the wavenumber of light emitted when an electron in a hydrogen atom transitions from \( n = 4 \) to \( n = 2 \)? (\( R_H = 1.097 \times 10^7 \, \text{m}^{-1} \))

Q9. Which particle has the highest charge-to-mass ratio?

Q10. The angular momentum of an electron in the sixth orbit of \( \text{Li}^{2+} \) is \( 6.33 \times 10^{-34} \, \text{J s} \). What is its radius? (\( h = 6.626 \times 10^{-34} \, \text{J s} \), \( r_1 \) for H = \( 5.29 \times 10^{-11} \, \text{m} \))

NEET Chemistry — Structure of Atom

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The frequency of a photon emitted during a transition from \( n = 6 \) to \( n = 3 \) in a hydrogen atom is: (\( E_1 = -2.18 \times 10^{-18} \, \text{J} \), \( h = 6.626 \times 10^{-34} \, \text{J s} \))

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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 Frequency, Transition, Hydrogen, Orbitals, Velocities, 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. The frequency of a photon emitted during a transition from \( n = 6 \) to \( n = 3 \) in a hydrogen atom is: (\( E_1 = -2.18 \times 10^{-18} \, \text{J} \), \( h = 6.626 \times 10^{-34} \, \text{J s} \))

  • A. \( 2.741 \times 10^{14} \, \text{Hz} \)
  • B. \( 3.291 \times 10^{14} \, \text{Hz} \)
  • C. \( 1.645 \times 10^{14} \, \text{Hz} \)
  • D. \( 4.935 \times 10^{14} \, \text{Hz} \)

Q2. How many orbitals are present in the \( n = 3 \) energy level of an atom?

  • A. 9
  • B. 4
  • C. 16
  • D. 25

Q3. The ratio of the velocities of an electron in the first orbit of \( \text{H} \) to the second orbit of \( \text{He}^+ \) is: (\( v_1 \) for H = \( 2.19 \times 10^6 \, \text{m s}^{-1} \))

  • A. 2
  • B. 0.5
  • C. 4
  • D. 1

Q4. The ionization energy of \( \text{H} \) is \( 13.6 \, \text{eV} \). What is the energy required to excite an electron in \( \text{He}^+ \) from \( n = 2 \) to \( n = 4 \)?

  • A. \( 13.6 \, \text{eV} \)
  • B. \( 10.2 \, \text{eV} \)
  • C. \( 40.8 \, \text{eV} \)
  • D. \( 6.8 \, \text{eV} \)

Q5. A hydrogen atom emits a photon of wavelength \( 410.2 \, \text{nm} \). What is the energy difference between the initial and final states? (\( h = 6.626 \times 10^{-34} \, \text{J s} \), \( c = 3.0 \times 10^8 \, \text{m s}^{-1} \))

  • A. \( 3.026 \times 10^{-19} \, \text{J} \)
  • B. \( 6.626 \times 10^{-19} \, \text{J} \)
  • C. \( 4.847 \times 10^{-19} \, \text{J} \)
  • D. \( 2.423 \times 10^{-19} \, \text{J} \)

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