This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom – Quiz 33 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 33 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The wave number of the first emission line in the H atom spectrum in the Balmer series in terms of Rydberg's constant (R) is given by A) $\frac{5R}{36}cm^{-1}$. B) $\frac{7R}{144}cm^{-1}$. C) $\frac{3R}{4}cm^{-1}$. D) $\frac{9R}{400}cm^{-1}$. Show Answer Correct Answer: A) $\frac{5R}{36}cm^{-1}$. 2. Which lines lie in visible region? A) Lyman. B) Balmer. C) Paschen. D) Pfund. Show Answer Correct Answer: B) Balmer. 3. How many electrons are in an atom with an atomic number of 50? A) 5. B) 8. C) 50. D) 2. Show Answer Correct Answer: C) 50. 4. What is u A) Uniform mass. B) Used mass. C) Unified mass. D) Unused mass. Show Answer Correct Answer: C) Unified mass. 5. Which element has an atomic number of 6? A) Oxygen. B) Carbon. C) Nitrogen. D) Helium. Show Answer Correct Answer: B) Carbon. 6. Which of the following atoms would have a charge of 1? A) An atom with 9 protons, 9 electrons, and 9 neutrons. B) An atom with 7 protons, 11 electrons, and 8 neutrons. C) An atom with 5 protons, 5 electrons, and 4 neutrons. D) An atom with 6 protons, 5 electrons, and 7 neutrons. Show Answer Correct Answer: D) An atom with 6 protons, 5 electrons, and 7 neutrons. 7. Which principle states that no two electrons can have the same set of quantum numbers? A) Hund's rule. B) De Broglie relation. C) Pauli exclusion principle. D) Aufbau principle. Show Answer Correct Answer: C) Pauli exclusion principle. 8. The orbital with n =3, l = 1 is designated by A) 3s. B) 3p. C) 3d. D) 3f. Show Answer Correct Answer: B) 3p. 9. If the atom has 25 electrons, how many protons does it need to have to be neutral? A) 5 protons. B) 25 protons. C) It doesn't need protons. D) 15 protons. Show Answer Correct Answer: B) 25 protons. 10. The principle quantum number, n, represents the: A) Spin value. B) Suborbital value. C) Energy level. D) Magnetic value. Show Answer Correct Answer: C) Energy level. 11. What is the symbol of sodium? A) S. B) NA. C) Na. D) So. Show Answer Correct Answer: C) Na. 12. A neutral atom (atomic number > 1) has A) Electron and proton. B) Neutron and electron. C) Neutron, electron and proton. D) Neutron and proton. Show Answer Correct Answer: C) Neutron, electron and proton. 13. He found that electrons have specific amounts of energy and move in specific orbits around the nucleus, like planets orbiting the sun. A) J.J. Thomson. B) Ernest Rutherford. C) Niels Bohr. D) James Chadwick. Show Answer Correct Answer: C) Niels Bohr. 14. What is the charge and location of a proton? A) Protons have a positive charge and are in the nucleus. B) Protons have a negative charge and are in the nucleus. C) Protons have a positive charge and are in the electron cloud. D) Protons have a neutral charge and are in the nucleus. Show Answer Correct Answer: A) Protons have a positive charge and are in the nucleus. 15. The relative mass of a proton/neutron is ..... A) 0. B) 1. C) 2. D) 3. Show Answer Correct Answer: B) 1. 16. What are atoms of an element having the same number of protons but a different number of neutrons called? A) Ion. B) Isotope. C) Proton. D) Neutron. Show Answer Correct Answer: B) Isotope. 17. What information does the Atomic Number on an element's key give us? A) Total number of protons and neutrons. B) Number of electrons only. C) Number of neutrons only. D) Number of protons only. Show Answer Correct Answer: D) Number of protons only. 18. What sub-atomic particle is this?-Found the Nucleus-No Charge A) Proton. B) Electron. C) Neutron. D) None of the above. Show Answer Correct Answer: C) Neutron. 19. No two electrons in an atom can have the same set of four quantum numbers. this is A) Aufbau principle. B) Pauli exclusion principle. C) Hunds rule of maximum multiplicity. D) Heisenberg uncertainty principle. Show Answer Correct Answer: B) Pauli exclusion principle. 20. Which of the following parts of an atom are positively charged? A) Neutron. B) Proton. C) Electron. D) Nucleus. Show Answer Correct Answer: B) Proton. 21. Which particles are neutral and located in the nucleus of an atom? A) Atom. B) Mass. C) Proton. D) Neutron. Show Answer Correct Answer: D) Neutron. 22. Which of the following elements does not exhibit the electrovalencey? A) Sodium. B) Calcium. C) Carbon. D) Chlorine. Show Answer Correct Answer: C) Carbon. 23. The electron arrangement of O is 2, 6. How many protons does O have? A) 6. B) 2. C) 8. D) 10. Show Answer Correct Answer: C) 8. 24. The emission spectrum of hydrogen atom is a line spectrum because A) Energy is required to excite an electron. B) Electrons which are unstable will radiate energy. C) An excited electron has a higher energy and is not stable. D) The energy of an electron an a hydrogen atom is quantised. Show Answer Correct Answer: D) The energy of an electron an a hydrogen atom is quantised. 25. The isotopes of a same element have: A) Same mass number. B) Same atomic number. C) Different mass number. D) Both b & c. Show Answer Correct Answer: D) Both b & c. ← PreviousNext →Related QuizzesClass 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 1Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 2Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 3Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 4Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 5Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 6Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 7Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 8Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 9Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books