This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom – Quiz 45 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 45 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Neutron was discovered by A) James Chadwick, 1932. B) J.J Thomson, 1897. C) E. Goldstein, 1888. D) None of the above. Show Answer Correct Answer: A) James Chadwick, 1932. 2. Value of l (azimuthal quantum number) for d subshell is A) 0. B) 1. C) 2. D) 3. Show Answer Correct Answer: C) 2. 3. Sodium (Na) and potassium (K) are in the same group on the periodic table. Based on their locations, which statement about sodium and potassium is true? A) Sodium is less electronegative than potassium. B) Sodium has fewer energy levels than potassium. C) Sodium has a larger ionic radius than potassium. D) Sodium has lower ionization energy than potassium. Show Answer Correct Answer: B) Sodium has fewer energy levels than potassium. 4. What is the positively charged region at the center of an atom called? A) Atom. B) Mass. C) Proton. D) Nucleus. Show Answer Correct Answer: D) Nucleus. 5. Number of electrons in one Orbital A) 2. B) 6. C) 10. D) 14. Show Answer Correct Answer: A) 2. 6. The conclusion that every additional electron enters the orbital with lowest possible energy has been drawn from A) Pauli's exclusion principle. B) Hund's rule. C) Aufbau principle. D) De-Broglie's equation. Show Answer Correct Answer: C) Aufbau principle. 7. According to dalton atom is A) Divisible. B) Indivisible. C) All the above. D) None of the above. Show Answer Correct Answer: B) Indivisible. 8. What is the primary reason for the stability of an atom according to Rutherford's model? A) Neutrons provide stability. B) Electrostatic forces between nucleus and electrons. C) Electrons are in fixed orbits. D) Electrons are stationary. Show Answer Correct Answer: B) Electrostatic forces between nucleus and electrons. 9. Deutrium is used to make A) Light water. B) Heavy water. C) Soft water. D) Hard water. Show Answer Correct Answer: B) Heavy water. 10. No. of radial, angular, total nodes for 4f subshell A) 0, 3, 3. B) 4, 3, 7. C) 3, 0, 3. D) 3, 4, 7. Show Answer Correct Answer: A) 0, 3, 3. 11. Where are the electrons located in an atom? A) Atom. B) Mass. C) Proton. D) Electron Cloud. Show Answer Correct Answer: D) Electron Cloud. 12. How many shells does an atom have? A) 3. B) 8. C) 2. D) 4. Show Answer Correct Answer: D) 4. 13. Which isotope of an element is used in the treatment of goitre? A) Iodine. B) Hydrogen. C) Oxygen. D) Carbon. Show Answer Correct Answer: A) Iodine. 14. The isotope Deuterium has A) No neutrons and one proton. B) One neutrons and two protons. C) One electron and two neutron. D) One proton and one neutron. Show Answer Correct Answer: D) One proton and one neutron. 15. If the atomic number of an element is 12. Predict the valency of this element. Is it a metal or a non-metal? A) 2, Non-metal. B) 2, Metal. C) 6, Non-metal. D) 6, Metal. Show Answer Correct Answer: B) 2, Metal. 16. Dalton's atomic theory successfully explained(i) Law of conservation of mass(ii) Law of constant composition(iii) Law of radioactivity(iv) Law of multiple proportion A) (i), (ii) and (iii). B) (i), (iii) and (iv). C) (ii), (iii) and (iv). D) (i), (ii) and (iv). Show Answer Correct Answer: D) (i), (ii) and (iv). 17. What are defined as atoms having the same mass number but different atomic numbers? A) Isobar. B) Isotope. C) Isotone. D) Isomer. Show Answer Correct Answer: A) Isobar. 18. Where is an atom's electron cloud located? A) Inside the nucleus. B) Outside of the atom. C) Surrounding the nucleus. D) None of the above. Show Answer Correct Answer: C) Surrounding the nucleus. 19. Na$^{+}$ has 12 neutrons and 10 electrons. Which of the following statement is correct? A) Na$^{+}$ has atomic number equal to 10 and mass number 22. B) Na$^{+}$ has atomic number equal to 11 and mass number 23. C) Na$^{+}$ has atomic number equal to 10 and mass number 23. D) Na$^{+}$ has atomic number equal to 11 and mass number 22. Show Answer Correct Answer: B) Na$^{+}$ has atomic number equal to 11 and mass number 23. 20. An atom of silicon has 14 protons and 15 neutrons. What is the mass number of this atom of silicon? A) 14. B) 15. C) 29. D) 28.085. Show Answer Correct Answer: C) 29. 21. Which of the subatomic particles is the lightest A) All have the same mass. B) Protons. C) Neutrons. D) Electrons. Show Answer Correct Answer: D) Electrons. 22. Who performed the famous 'gold foil experiment'? A) Dalton. B) Thomson. C) Rutherford. D) Bohr. Show Answer Correct Answer: C) Rutherford. 23. "C" is the element symbol for which element? A) Calcium. B) Carbon. C) Chlorine. D) Cadmium. Show Answer Correct Answer: B) Carbon. 24. Which of the following elements has the same number of protons, electrons and neutrons A) Al. B) Mg. C) P. D) Cl. Show Answer Correct Answer: B) Mg. 25. Alpha particle has charge of A) 1+. B) 2+. C) 1-. D) 2-. Show Answer Correct Answer: B) 2+. ← 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