This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom – Quiz 39 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 39 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The atomic number of Sodium is 11 and mass number is 23u. It consists of A) 11 protons and 12 neutrons. B) 12 protons and 11 neutrons. C) 12 protons and 11 electrons. D) 12 electrons and 11 neutrons. Show Answer Correct Answer: A) 11 protons and 12 neutrons. 2. The ionisation energy of H-atom (in the ground state) is x kJ. The energy required for an electronto jump from 2nd to 3rd orbit will be A) X/6. B) 5x. C) 7.2x. D) 5x / 36. Show Answer Correct Answer: D) 5x / 36. 3. A substance that does not conduct electricity and is not malleable A) Non-Metal. B) Gold. C) Metal. D) Aluminum. Show Answer Correct Answer: A) Non-Metal. 4. Idea was of an indivisible particle of matter he called "atomos" A) John Dalton. B) Aristotle. C) Democritus. D) Plato. Show Answer Correct Answer: C) Democritus. 5. Atomic number of an element is 19, its electronic configuration is A) 2, 8, 9. B) 2, 8, 8, 1. C) 2, 8, 1. D) 2, 9, 8. Show Answer Correct Answer: B) 2, 8, 8, 1. 6. What is the "magic number" of valence electrons for atoms to be stable? A) 1. B) 2. C) 8. D) 18. Show Answer Correct Answer: C) 8. 7. What is the maximum number of electrons in p subshell? A) 6. B) 8. C) 10. D) 14. Show Answer Correct Answer: B) 8. 8. F$^{3-}$ has an electron arrangement of 2.8.8. How many protons does F$^{3-}$ have? A) 15. B) 18. C) 8. D) 10. Show Answer Correct Answer: A) 15. 9. Discovered the electron A) Dalton. B) Thomson. C) Rutherford. D) Bohr. Show Answer Correct Answer: B) Thomson. 10. The following can be found on the Periodic Elements ..... A) The number of atoms in a carbon dioxide molecule. B) All the compounds that exist in the natural world. C) The chemical formula for water. D) All the elements that have been discovered or created in a lab. Show Answer Correct Answer: D) All the elements that have been discovered or created in a lab. 11. In Bohr model of the hydrogen atom, the lowest orbit corresponds to A) Infinite energy. B) The maximum energy. C) The minimum energy. D) Zero energy. Show Answer Correct Answer: C) The minimum energy. 12. The innermost orbital electron is A) K. B) L. C) M. D) N. Show Answer Correct Answer: A) K. 13. The correct electronic configuration of a chloride ion is: A) 2, 8. B) 2, 8, 4. C) 2, 8, 8. D) 2, 8, 7. Show Answer Correct Answer: C) 2, 8, 8. 14. What did J.J. Thomson's experiment show? A) The atom is like a uniform sphere. B) Cathode rays are made up of electrons. C) All atoms undergo radioactive decay. D) Isotopes undergo radioactive decay. Show Answer Correct Answer: A) The atom is like a uniform sphere. 15. The number of neutrons in $_{18}$Ar$^{40}$ is A) 18. B) 40. C) 22. D) 20. Show Answer Correct Answer: C) 22. 16. The mass number of two atoms X and Y is the same (40 each) but their atomic numbers are different (being20 and 18 respectively). X and Y are examples of: A) Chemically similar atoms. B) Isotopes. C) Solid and liquid metals. D) Isobars. Show Answer Correct Answer: D) Isobars. 17. Who developed the law of conservation of mass? A) Antoine Lavoisier. B) Francis Aston. C) Michael Faraday. D) Joseph Proust. Show Answer Correct Answer: A) Antoine Lavoisier. 18. If I have three atoms and they all have the same atomic number. Which is true? A) They must have the same number of protons. B) Then must have the same number of neutrons. C) They must be different elements. D) None of the above. Show Answer Correct Answer: A) They must have the same number of protons. 19. All orbitals of equal energy are occupied by one electron before any single orbital is occupied by a second electron. A) Aufbau principle. B) Pauli exclusion principle. C) Hund's rule. D) Core Notation. Show Answer Correct Answer: C) Hund's rule. 20. Wavelengths of different radiations are given below:lambda(A) = 300nmlambda(B) = 300micrimetrelambda(C) = 3nmlambda(D) = 30A Arrange these radiations in the increasing order of their energies. A) B < A < C = D. B) A C) A=B D) A>B>C=D. Show Answer Correct Answer: A) B < A < C = D. 21. What is an alpha particle? A) It is a dominant particle in a subatomic world. B) It is a particle that has 2+ charge. C) It is a particle that has 2-charge. D) It is a helium atom without a charge. Show Answer Correct Answer: B) It is a particle that has 2+ charge. 22. James Chadwick is known for: A) Discovering that the atom is mostly empty space. B) The plum pudding model. C) Discovering the neutron. D) Discovering that electrons move in energy levels. Show Answer Correct Answer: C) Discovering the neutron. 23. Who did the Alpha-Scattering Experiment? A) John Dalton. B) Alfred Nobel. C) Ernest Rutherford. D) James Watson. Show Answer Correct Answer: C) Ernest Rutherford. 24. Two atoms of the same element can differ in which of the following? A) Only in the number of neutrons or electrons. B) Only in the number of protons or neutrons. C) All the above. D) None of the above. Show Answer Correct Answer: A) Only in the number of neutrons or electrons. 25. How many electrons will have the following quantum numbers. n = 3, m$_{s}$ =-1/2 A) 18. B) 9. C) 6. D) 3. Show Answer Correct Answer: B) 9. ← 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