This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom – Quiz 22 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 22 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The region where this probability density function reduces to zero is called ..... A) Orbital. B) Orbit. C) Node. D) Shell. Show Answer Correct Answer: C) Node. 2. All of the following were theorized by Bohr in his description of the atom except A) The angular momentum of electrons in multiples of h/2?. B) Electrons revolve in discrete circular orbits. C) The energy of each electron is directly proportional to n2. D) Electrons radiate energy continuously in a given orbit. Show Answer Correct Answer: D) Electrons radiate energy continuously in a given orbit. 3. What is the maximum number of electrons that are allowed in the second orbital? A) 2. B) 18. C) 8. D) 9. Show Answer Correct Answer: C) 8. 4. The ion of an element has 2 positive charge. Mass number of the atom is 24 and the number of neutrons is 12. What is the number of electrons in the ion? A) 8. B) 10. C) 12. D) 24. Show Answer Correct Answer: B) 10. 5. This subatomic particle is much smaller than the other two. A) Proton. B) Neutron. C) Electron. D) None of the above. Show Answer Correct Answer: C) Electron. 6. P-32 is used in the treatment of- A) Leukemia. B) Blockage of arteries. C) Cancer. D) Thyroid disorders. Show Answer Correct Answer: A) Leukemia. 7. Sum of unpaired electrons in orbital with l=2 in all species fe2+ and ni2+ A) 9. B) 12. C) 6. D) 15. Show Answer Correct Answer: C) 6. 8. Is an atom has 7 electrons and 7 neutrons, then its atomic number and mass number will be ..... and ..... respectively A) 7, 7. B) 7, 14. C) 7, 6. D) 14, 7. Show Answer Correct Answer: B) 7, 14. 9. Two electrons in an atom cannot have the same set of all the four quantum numbers, was given by A) Pauli's Exclusive Principle. B) Hund's rule. C) Aufbau Principle. D) Bohr's Theory. Show Answer Correct Answer: A) Pauli's Exclusive Principle. 10. Adding electrons to an atom makes a(n) A) Positive ion. B) Isotope. C) Negative ion. D) New element. Show Answer Correct Answer: C) Negative ion. 11. An element that has 9 protons, 9 electrons, and 10 neutrons. What is the atomic number? A) 9. B) 10. C) 19. D) 28. Show Answer Correct Answer: A) 9. 12. An atom has atomic number 20, what is the number of electrons in the M-shell? A) 6. B) 0. C) 2. D) 8. Show Answer Correct Answer: D) 8. 13. Which has exceptional configuration A) Cr. B) Sc. C) Fe. D) Cl. Show Answer Correct Answer: A) Cr. 14. Which subatomic particle is found in the nucleus and has a positive charge? A) Electron. B) Neutron. C) Proton. D) Quark. Show Answer Correct Answer: C) Proton. 15. Subsidiary quantum number values are follows A) 1, 2, 3, 4 . B) 0, 1, 2, 3, 4 . C) Zero and goes in either direction. D) +1/2 and-1/2. Show Answer Correct Answer: B) 0, 1, 2, 3, 4 . 16. The charge on the nucleus of an atom is . A) Negative. B) Neutral. C) Negative and positive. D) Positive. Show Answer Correct Answer: D) Positive. 17. Who discovered electron? A) Chadwick. B) JJ Thomson. C) John Dalton. D) Rutherford. Show Answer Correct Answer: B) JJ Thomson. 18. What is the mass of an Osmium (Os) atom that has 76 neutrons and 76 electrons A) 18. B) 19. C) 20. D) 190. Show Answer Correct Answer: D) 190. 19. What is the amount of matter in an object? A) Atom. B) Mass. C) Proton. D) Neutron. Show Answer Correct Answer: B) Mass. 20. O is the symbol for ..... A) Oxygen. B) Ozone. C) Hydrogen. D) Osmium. Show Answer Correct Answer: A) Oxygen. 21. Which of the following best describes an electron? A) It has no charge and about the same mass as a proton. B) It has a negative charge and much less mass than a proton. C) It has a positive charge and much more mass than a neutron. D) It has a negative charge and about the same mass as a neutronTags112.20.b.5.A. Show Answer Correct Answer: B) It has a negative charge and much less mass than a proton. 22. Where is the neutron located? A) Nucleus. B) Energy shells. C) Electron cloud. D) The outside of an atom. Show Answer Correct Answer: A) Nucleus. 23. Rutherford's 'alpha ($\alpha$) particles scattering experiment' resulted in todiscovery of A) Electron. B) Proton. C) Nucleus in the atom. D) Atomic Mass. Show Answer Correct Answer: C) Nucleus in the atom. 24. The total number of atomic orbitals in 4$^{th}$ energy level of an atom is A) 16. B) 32. C) 2. D) 14. Show Answer Correct Answer: A) 16. 25. What are the subatomic particles? A) Protons, Electrons, Neutrons. B) Molecules, and atoms. C) Electrons, Protons, Nucleus. D) Nucleus, and Electrons. Show Answer Correct Answer: A) Protons, Electrons, Neutrons. ← 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