This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom – Quiz 44 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 44 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If an atom has 12 protons, 13 neutrons, and 12 electrons, what is the charge of the nucleus? A) +12. B) -13. C) -12. D) +13. Show Answer Correct Answer: A) +12. 2. What is the mass of proton used for practical purposes? A) 1u. B) 2u. C) 3u. D) 0. Show Answer Correct Answer: A) 1u. 3. Electronic configuration of Sodium is ( Shells )? A) 2, 8. B) 2, 8, 1. C) 2, 1, 8. D) 1, 2, 8. Show Answer Correct Answer: B) 2, 8, 1. 4. In the atomic spectrum of hydrogen, the spectral lines pertaining to electronic transition of n = 4 to n = 2 refers to A) Lyman lines. B) Balmer lines. C) Paschen lines. D) Brackett lines. Show Answer Correct Answer: B) Balmer lines. 5. How many quantum numbers are needed to describe the energy state of an electron in an atom? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: D) 4. 6. What causes the photoelectric effect according to Einstein? A) Photons knock out electrons. B) Electrons absorb energy. C) Radiation pressure. D) Lattice vibrations. Show Answer Correct Answer: A) Photons knock out electrons. 7. This subatomic particle contributes to the charge and the mass of an atom. A) Proton. B) Neutron. C) Electron. D) None of the above. Show Answer Correct Answer: A) Proton. 8. Subatomic particle with a positive charge. A) Proton. B) Neutron. C) Electron. D) None of the above. Show Answer Correct Answer: A) Proton. 9. What is the central part of an atom called? A) Nucleus. B) Electron cloud. C) Proton. D) Neutron. Show Answer Correct Answer: A) Nucleus. 10. 1s & 2s orbitals have similar A) Size. B) Energy. C) Shape. D) Radius. Show Answer Correct Answer: C) Shape. 11. Total number of orbitals present in a given energy level with principal quantum number n = 3 is A) 3. B) 9. C) 12. D) 18. Show Answer Correct Answer: B) 9. 12. Contributes basically no mass to an atom. A) Protons. B) Neutrons. C) Electrons. D) Protons and neutrons. Show Answer Correct Answer: C) Electrons. 13. Which particle has a positive electrical charge? A) Proton. B) Neutron. C) Electron. D) None of the above. Show Answer Correct Answer: A) Proton. 14. Which of the following lists the two subatomic particles that contribute the most to the mass of an atom? A) Protons and electrons. B) Protons and neutrons. C) Neutrons and electrons. D) Electrons and ions. Show Answer Correct Answer: B) Protons and neutrons. 15. What property of an element determines its chemical behavior? A) Size of an element. B) Valency of an element. C) Molar mass of the element. D) None of these. Show Answer Correct Answer: B) Valency of an element. 16. The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion?(a) 13(b) 10(c) 14(d) 16 A) A. B) B. C) C. D) D. Show Answer Correct Answer: B) B. 17. Which of the following statements regarding the hydrogen atom spectrum is not correct A) The single electron in hydrogen jumps to higher energy levels. B) The energy of an electron in a hydrogen atom is quantised. C) Hydrogen is the only element that can produce an atomic spectrum. D) When an electron has the smallest allowable amount of energy, it is in the ground state. Show Answer Correct Answer: C) Hydrogen is the only element that can produce an atomic spectrum. 18. The term degenerate means A) Equal energy of orbitals of same subshell. B) Equal energy of subshells of same shell. C) Unequal energy of orbitals in same subshell. D) Unequal energy of subshells of same shell. Show Answer Correct Answer: A) Equal energy of orbitals of same subshell. 19. A neutron is formed by an electron and a proton combining together. Therefore, it is neutral. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 20. Na is the symbol for ..... A) Helium. B) Sulfur. C) Neon. D) Sodium. Show Answer Correct Answer: D) Sodium. 21. The credit for the discovery for Protons is given to? A) Michael Faraday. B) Neils Bohr. C) Ernest Rutherford. D) Eugen Goldstein. Show Answer Correct Answer: D) Eugen Goldstein. 22. Isobars do not differ in the number of(a) protons(b) electrons(c) neutrons(d) nucleons A) A. B) B. C) C. D) D. Show Answer Correct Answer: D) D. 23. The ..... waves do not require medium to travel. A) Sound waves. B) Electromagnetic waves. C) Water waves. D) Heat waves. Show Answer Correct Answer: B) Electromagnetic waves. 24. K is the symbol for ..... A) Phosphorus. B) Calcium. C) Potassium. D) Carbon. Show Answer Correct Answer: C) Potassium. 25. The first energy level can hold up to, how many electrons? A) 8. B) 4. C) 2. D) 5. Show Answer Correct Answer: C) 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