This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 15 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The symbol for MAGNESIUM is ..... A) Mg. B) Ma. C) Mm. D) M. Show Answer Correct Answer: A) Mg. 2. Which of the following set of quantum numbers is not valid? A) 2, 0, 0, 1/2. B) 2, 0, 1, 1/2. C) 2, 1, 1, 1/2. D) 2, 1, 0, 1/2. Show Answer Correct Answer: B) 2, 0, 1, 1/2. 3. Which of the following is the correct electronic configuration of sodium? A) 2, 8, 1. B) 8, 2, 1. C) 2, 1, 8. D) 2, 8, 2. Show Answer Correct Answer: A) 2, 8, 1. 4. An atom is electrically neutral when A) Protons and neutrons are the same. B) Protons and electrons are the same. C) Neutrons and electrons are the same. D) Neutrons balance the protons and electrons. Show Answer Correct Answer: B) Protons and electrons are the same. 5. For which of the following species, Bohr's theory is not applicable? A) Be 3+. B) Li 2+. C) He 2+. D) H. Show Answer Correct Answer: A) Be 3+. 6. Shape of the orbital is given by ..... A) Magnetic Quantum Number. B) Principle Quantum Number. C) Azimuthal Quantum Number. D) Spin Quantum Number. Show Answer Correct Answer: C) Azimuthal Quantum Number. 7. What is the shape of p orbitals? A) Dumbbell. B) Spherical. C) Triangular. D) Hexagonal. Show Answer Correct Answer: B) Spherical. 8. If r is the radius of first orbit, the radius of n$^{th }$orbit of the H atom will be A) R n $^{2}$. B) R n. C) R/n. D) R$^{2}$n $^{2 }$. Show Answer Correct Answer: A) R n $^{2}$. 9. S is the symbol for the element ..... A) Silver. B) Sodium. C) Sulfur. D) Silicon. Show Answer Correct Answer: C) Sulfur. 10. The uncertainties in the velocity of two particles A and B are 0.05 and 0.02 ms respectively. Themass of B is five times to that of A. The ratio of uncertainties in their positions is: A) 2. B) 4. C) 1. D) 0.25. Show Answer Correct Answer: A) 2. 11. The atomic particle with no charge is the ..... A) Proton. B) Neutron. C) Electron. D) Nucleus. Show Answer Correct Answer: B) Neutron. 12. The maximum number of electrons that can be accommodated in a sublevel for which l = 3 is: A) 2. B) 4. C) 10. D) 14. Show Answer Correct Answer: D) 14. 13. An atom of a certain element has 36 protons, 36 electrons, and a mass number of 84. At room temperature this element is a very stable gas. How many neutrons are in this atom? A) 36. B) 84. C) 72. D) 48. Show Answer Correct Answer: D) 48. 14. This subatomic particle has a positive charge. A) Proton. B) Neutron. C) Electron. D) None of the above. Show Answer Correct Answer: A) Proton. 15. Which of the following has wavelengths longer than microwaves? A) Infrared waves. B) Radio waves. C) Visible light. D) None of the above. Show Answer Correct Answer: B) Radio waves. 16. Naturally occurring rubidium consists of just two isotopes. One of the isotopes consists of atoms having a mass of 84.912 amu; the other of 86.901 amu. What is the percent natural abundance of the heavier isotope? A) 15%. B) 28%. C) 37%. D) 72%. Show Answer Correct Answer: B) 28%. 17. Found in the nucleus of an atom. This particle has a positive charge. A) Neutron. B) Proton. C) Electron. D) Decepticon. Show Answer Correct Answer: B) Proton. 18. Carbon-12 atom has ..... A) 6 electrons, 12 protons, 6 neutrons. B) 12 electrons, 6 protons, 6 neutrons. C) 6 electrons, 6 protons, 6 neutrons. D) 18 electrons, 6 protons and 6 neutrons. Show Answer Correct Answer: C) 6 electrons, 6 protons, 6 neutrons. 19. If an atom has 12 positively charged subatomic particles, which of the following must it also have to be considered a neutral atom? A) 12 neutrons. B) 12 electrons. C) 12 protons. D) 24 protons and neutrons. Show Answer Correct Answer: B) 12 electrons. 20. When alpha particles are projected on Beryllium, then A) Electrons are emitted. B) Protons are emitted. C) Neutrons are emitted. D) None of these. Show Answer Correct Answer: C) Neutrons are emitted. 21. Symbol of electron A) E-. B) E. C) All the above. D) None of the above. Show Answer Correct Answer: A) E-. 22. Rutherford's alpha particle scattering experiment led to the discovery of: A) Nucleus. B) Electrons. C) Protons. D) Neutrons. Show Answer Correct Answer: A) Nucleus. 23. How many subshell are associated with n=4 A) 2. B) 3. C) 4. D) 5. Show Answer Correct Answer: C) 4. 24. Isotopes of an element have a different number of ..... A) Protons. B) Neutrons. C) Electrons. D) Mass. Show Answer Correct Answer: B) Neutrons. 25. The electronic configuration of silver atom in ground state is A) [Kr]3d104s1. B) [Xe]4f14 5d10 6s1. C) [Kr]4d10 5s1. D) [Kr]4d9 5s2. Show Answer Correct Answer: C) [Kr]4d10 5s1. ← 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