Jump to a section

Chemistry - Structure of Atom

Practise 27 BITSAT previous year questions on Structure of Atom, compiled from papers spanning 2010 to 2024. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty BITSAT tests.

Structure of Atom has been asked in 13 of the 16 years of BITSAT papers analysed (2009–2024), with 27 questions in all. 37% of them were easy, 59% moderate and 4% tough. Most of its questions came from 2024, with 5 questions that year. In the last three years (2022–2024) it had 9 questions across 5 papers, about 1.8 per paper.

The chapter's 6 topics are not weighted equally: Bohr's model (8 questions, 30%), Dual Behaviour of Matter and Heisenberg Uncertainty Principle (6 questions, 22%), and Hydrogen spectrum (5 questions, 19%) have been asked the most. Bohr's model has also led over the last five years, with 4 questions. Dual Behaviour of Matter and Heisenberg Uncertainty Principle has produced the most tough questions (1).

  1. 1A photon of wavelength strikes a metal surface. The work function of the metal is 2.13 eV. What is the kinetic energy of the emitted photoel2024 (Memory Based Paper 1)Dual Behaviour of Matter and Heisenberg Uncertainty Principle
  2. 2A stream of electrons from a heated filament was passed between two charged plates kept at a potential difference volt. If 'e' and are charg2024 (Memory Based Paper 1)Dual Behaviour of Matter and Heisenberg Uncertainty Principle
  3. 3The energy of second orbit of hydrogen atom is . What is the energy of first orbit of ion (in J ?2024 (Memory Based Paper 2)Bohr's model
  4. 4The degeneracy of hydrogen atom that has energy equal to is (where, Rydberg constant)2024 (Memory Based Paper 3)Bohr's model
  5. 5If the de-broglie wavelength of a particle of mass is 100 times its velocity. Then, its value in terms of its mass and plank constant is2024 (Memory Based Paper 3)Dual Behaviour of Matter and Heisenberg Uncertainty Principle
  6. 6The Bohr orbit radius for the hydrogen atom is approximately . The radius for the first excited state orbit is (in )2023 (Memory Based Paper 1)Bohr's model
  7. 7The probability density plots of and orbitals are given in figure. The density of dots in a region represents the probability density of fin2023 (Memory Based Paper 1)Quantum mechanical model
  8. 8Observe the given boundary surface diagrams of two orbitals I and II and choose the correct option.2023 (Memory Based Paper 2)Quantum mechanical model
  9. 9If the radius of the Bohr's orbit of hydrogen atom is and the radius of Bohr's orbit is . Then:2023 (Memory Based Paper 2)Bohr's model
  10. 10The frequency of radiation emitted when the electron falls from to in a hydrogen atom will be (Given : ionization energy of atom and )2021Hydrogen spectrum
  11. 11The difference in the number of unpaired electrons of a metal ion in its high-spin and low-spin octahedral complexes is two. The metal ion i2021Electronic configuration
  12. 12Calculate the wavelength (in nanometer) associated with a proton moving at . (Mass of proton and2021Dual Behaviour of Matter and Heisenberg Uncertainty Principle
  13. 13What is the maximum wavelength line in the Lyman series of ion?2020Hydrogen spectrum
  14. 14The wavelength corresponding to maximum energy for hydrogen is 91 . 2 nm . The corresponding wavelength for He + ion is2019Hydrogen spectrum
  15. 15In a homonuclear molecule, which of the following set of orbitals is degenerated?2019Bohr's model
  16. 16If the photon of wavelength 150 pm strikes an atom and one of its inner bound electron is ejected out with a velocity of 1 . 5 10 7 m / s , 2019Bohr's model
  17. 17If 0 . 53 10 - 10 4 metre is the radius of smallest electron orbit in hydrogen like atom, then the atom is2018Atomic Mass and Atomic Size
  18. 18In an atom, an electron is moving with a speed of 600 m / s with an accuracy of 0 . 005 % . Certainty with which the position of the electro2018Dual Behaviour of Matter and Heisenberg Uncertainty Principle
  19. 19The orbital angular momentum of an electron is 2 s orbital is2017Dual Behaviour of Matter and Heisenberg Uncertainty Principle
  20. 20Which of the following is an incorrect set of quantum members?2017Quantum mechanical model
  21. 21The first emission line in the atomic spectrum of hydrogen in the Balmer series appears at2016Hydrogen spectrum
  22. 22An e has magnetic quantum number as what is its principal quantum number?2016Quantum mechanical model
  23. 23The wave number of the limiting line in Lyman series of hydrogen is . The wave number of the limiting line in Balmer series of would be :2014Hydrogen spectrum
  24. 24The Bohr orbit radius for the hydrogen atom is approximately . The radius for the first excited state orbit is2013Bohr's model
  25. 25If the radius of is , then what will be the radius of ?2012Bohr's model
  26. 26Which of the following exhibit only+ 3 oxidation state?2011Electronic configuration
  27. 27Chloride ion and potassium ion are isoelectronic. Then :2010Atomic Mass and Atomic Size

Frequently Asked Questions

1.How many questions are available for Structure of Atom?

This chapter includes 27 questions compiled from BITSAT papers spanning 2010 to 2024.

2.Are these questions only from BITSAT, or from other exams too?

These are BITSAT questions specifically for the Structure of Atom chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Structure of Atom an important chapter for BITSAT Chemistry?

Structure of Atom has appeared in 13 of the 16 years of BITSAT papers covered here, with 27 questions across 16 papers - about 2 per paper it appears in.

4.What is the difficulty level of Structure of Atom questions in BITSAT?

Of the 27 questions analysed for this chapter, 37% are easy, 59% moderate and 4% tough. 2024 had the most, with 5 questions.

5.Which topics in Structure of Atom should I focus on?

These topics have carried the most weightage in Structure of Atom:

  • Bohr's model - 8 questions (30%)
  • Dual Behaviour of Matter and Heisenberg Uncertainty Principle - 6 questions (22%)
  • Hydrogen spectrum - 5 questions (19%)
  • Dual Behaviour of Matter and Heisenberg Uncertainty Principle has produced the most tough questions (1).
6.Is Structure of Atom's weightage in BITSAT going up or down?

Across all 16 papers analysed, Structure of Atom has averaged about 1.7 questions per paper. In the last three years (2022–2024), that average has stayed about the same, at about 1.8 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.