This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 20 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 7-For principal quantum number n = 4, the total number of orbitals having l = 3 is A) 3. B) 5. C) 7. D) 9. Show Answer Correct Answer: C) 7. 2. What is an atom that has gained or lost one or more electrons called? A) Ion. B) Isotope. C) Proton. D) Neutron. Show Answer Correct Answer: A) Ion. 3. Which of these best describes a neutron? A) It has no charge and about the same mass as a proton. B) It has a negative charge and about the same mass as a proton. C) It has no charge and about the same mass as an electron. D) It has a negative charge and about the same mass as an electron. Show Answer Correct Answer: A) It has no charge and about the same mass as a proton. 4. According to J.J. Thomson model of atom proton and neutron forms a sphere in which electron resides. true or false A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: A) False. 5. What did Niels Bohr suggest about electrons? A) They orbit the nucleus. B) They are part of the nucleus. C) They are static. D) They do not exist. Show Answer Correct Answer: A) They orbit the nucleus. 6. Who shows the existence of protons in the atoms? A) Chadwick. B) Rutherford. C) Goldstein. D) Bohr. Show Answer Correct Answer: C) Goldstein. 7. Which scientist proposed a new atomic model after discovering the electron in 1897? A) Dalton. B) Thomson. C) Rutherford. D) Bohr. Show Answer Correct Answer: B) Thomson. 8. The electron with which of the following values of quantum numbers is expected to possesshighest energy A) 3, 2, 2, 1/2. B) 4, 2, 0, 1/2. C) 4, 1, 0, -1/2. D) 5, 0, 0, 1/2. Show Answer Correct Answer: B) 4, 2, 0, 1/2. 9. Maximum number of electrons in a subshell with l = 3 and n = 4 is A) 12. B) 9. C) 18. D) 14. Show Answer Correct Answer: D) 14. 10. The atomic number of sodium is 11 and its mass number is 23. It has A) 11 neutrons and 12 protons. B) 12 protons and 11 electrons. C) 11 electrons and 12 neutrons. D) 12 electrons and 11 neutrons. Show Answer Correct Answer: C) 11 electrons and 12 neutrons. 11. To find the atomic mass, we ..... A) Add protons and electrons. B) Add protons and neutrons. C) Subtract protons and neutrons. D) Add neutrons and electrons. Show Answer Correct Answer: B) Add protons and neutrons. 12. Which of the following particles was discovered by Chadwick? A) Electron. B) Neutron. C) Alpha particle. D) Proton. Show Answer Correct Answer: B) Neutron. 13. When U-235 breaks up it produces A) Electrons. B) Neutrons. C) Protons. D) Nothing. Show Answer Correct Answer: B) Neutrons. 14. Planck's constant has the units of A) Work. B) Energy. C) Angular momentum. D) Linear momentum. Show Answer Correct Answer: C) Angular momentum. 15. In a hydrogen atom, an electron which orbital that has can absorb energy but cannot emit energy? A) 1s. B) 2p. C) 3s. D) 3d. Show Answer Correct Answer: A) 1s. 16. Nucleus contains both neutrons and protons A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 17. What carries no charge A) Neutrons. B) Electrons. C) Protons. D) None of the above. Show Answer Correct Answer: A) Neutrons. 18. The smallest part of the element with the properties of the element is the ..... A) Electron. B) Quark. C) Atom. D) Proton. Show Answer Correct Answer: C) Atom. 19. Atomic mass-Atomic Number = A) Protons. B) Neutrons. C) Electrons. D) Average Mass. Show Answer Correct Answer: B) Neutrons. 20. If N shell has s, p, d and f orbitals. How many electrons are present in N shell? A) 2. B) 10. C) 18. D) 32. Show Answer Correct Answer: D) 32. 21. Correct electronic configuration of copper is A) [Ar] 3d$^{9 }$4s$^{2}$. B) [Ar] 3d$^{10 }$4s$^{2}$. C) [Ar] 3d$^{10 }$4s$^{1}$. D) [Ar] 3d$^{9 }$4s$^{1}$. Show Answer Correct Answer: C) [Ar] 3d$^{10 }$4s$^{1}$. 22. Which of the following relates to photons both as wave motion and as a stream of particles? A) Interference. B) E = mc2. C) Diffraction. D) E =hv. Show Answer Correct Answer: D) E =hv. 23. When the electron of a hydrogen atom jumps from n=4 to n=1 state, the number of spectral lines emitted is A) 15. B) 6. C) 9. D) 3. Show Answer Correct Answer: B) 6. 24. What is the outer shell of an atom called? A) Electron cloud. B) Shell. C) All of the above. D) Orbital. Show Answer Correct Answer: C) All of the above. 25. There may be a maximum of ..... p orbitals at a given energy level. A) 2. B) 6. C) 3. D) 8. Show Answer Correct Answer: C) 3. ← 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