This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 3 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Consider the ground state of Cr atom (Z = 24). The numbers of electrons with the azimuthal quantum numbers, l = 1 and 2 are, respectively: A) 12 and 4. B) 12 and 5. C) 16 and 4. D) 16 and 5. Show Answer Correct Answer: B) 12 and 5. 2. Cathode rays are A) Electrons. B) Protons. C) Neutrons. D) Photons. Show Answer Correct Answer: A) Electrons. 3. A chart that scientists use to organize the elements. A) Periodic Table. B) Atomic Number. C) Name. D) Element. Show Answer Correct Answer: A) Periodic Table. 4. Atoms that have the same number of protons but different numbers of neutrons. A) Isotopes. B) Neutron. C) Proton. D) Atomic Mass. Show Answer Correct Answer: A) Isotopes. 5. Which subatomic particle is responsible for the chemical properties of an atom? A) Proton. B) Neutron. C) Electron. D) Nucleus. Show Answer Correct Answer: C) Electron. 6. What is the electrical charge of a proton? A) 1+. B) 1-. C) Neutral. D) 2-. Show Answer Correct Answer: A) 1+. 7. What are the frequency and the wavelength of radiations in nm when an electron in hydrogen atom jumps from third orbit to the ground state . A) 2.9X 10$^{15}$Hz, 103nm. B) 2.9X 10$^{15}$Hz, 206nm. C) 8.9X 10$^{15}$Hz, 103nm. D) 8.9X 10$^{15}$Hz, 206nm. Show Answer Correct Answer: A) 2.9X 10$^{15}$Hz, 103nm. 8. The scientist who discovered electron is A) James chadwick. B) Marie Curie. C) Albert Einstein. D) J.J. Thomson. Show Answer Correct Answer: D) J.J. Thomson. 9. Which of the following are true for an element?(i) Atomic number = number of protons + number of electrons(ii) Mass number = number of protons + number of neutrons(iii) Atomic mass = number of protons = number of neutrons(iv) Atomic number = number of protons = number of electrons A) (i) and (ii). B) (i) and (iii). C) (ii) and (iii). D) (ii) and (iv). Show Answer Correct Answer: D) (ii) and (iv). 10. What is the momentum of a particle which has a wave length of 2A$^{0}$? A) 3.3 x 10$^{-24}$ kg ms$^{-1}$. B) 3.3 x 10$^{-34}$ kg ms$^{-1}$. C) 3.3 x 10$^{-26}$ kg ms$^{-1}$. D) 13.2 x 10$^{-44}$ kg ms$^{-1}$. Show Answer Correct Answer: A) 3.3 x 10$^{-24}$ kg ms$^{-1}$. 11. The isotope use in the treatment of cancer and tumor is A) Phosphorus-31. B) Iodine-131. C) Uranium-235. D) Deuterium. Show Answer Correct Answer: B) Iodine-131. 12. Which of the following describes what is represented by the symbol Cl$^{-}$? A) An ionic compound. B) A polar molecule. C) A negative ion. D) A positive ion. Show Answer Correct Answer: C) A negative ion. 13. Which of the following statements explains why emission spectrum of hydrogen is a line spectrum? A) The hydrogen has only one electron. B) The lone electron in the hydrogen atom can revolve around the nucleus in fixed orbits only. C) The energy levels in the hydrogen atom are quantised. D) Electrons have dual nature. Show Answer Correct Answer: C) The energy levels in the hydrogen atom are quantised. 14. Describe an Electron Cloud? A) The mist outside of an atom. B) Home of the protons. C) Where electrons are located. D) Nucleus. Show Answer Correct Answer: C) Where electrons are located. 15. Which of the following doesn't relate to rutherford experiment: A) Most of the alpha particles pass straight through the gold foil without any deflection. B) A few alpha particles are deflected through small angles. C) The electrons revolve around the nucleus. D) Very few particles completely rebound. Show Answer Correct Answer: C) The electrons revolve around the nucleus. 16. Which two subatomic particles can be found in the nucleus of an atom? A) Ribosomes and endoplasmic reticulum. B) Neutrons and protons. C) Electrons and protons. D) Protons and alpha particles. Show Answer Correct Answer: B) Neutrons and protons. 17. The maximum kinetic energy of photoelectrons ejected from a metal, when it is irradiated with radiation of frequency 2 x 10$^{14}$ s$^{-1 }$is 6.63 x 10$^{-20}$ J. The threshold frequency of the metal is A) 2 x 10$^{-14}$ s$^{-1}$. B) 3 x 10$^{14}$ s$^{-1}$. C) 1 x 10$^{14}$ s$^{-1}$. D) 1 x 10$^{-14}$ s$^{-1}$. Show Answer Correct Answer: C) 1 x 10$^{14}$ s$^{-1}$. 18. Most of the mass in an atom is made up of ..... ? A) Protons and electrons. B) Protons and neutrons. C) Neutrons and electrons. D) Electrons and quarks. Show Answer Correct Answer: B) Protons and neutrons. 19. In discharged tube voltage and pressure were respectively- A) 1000 V, 0.01 mmHg. B) 10000 V, 0.01 mmHg. C) 10000 V, 0.001 mmHg. D) 1000 V, 0.001 mmHg. Show Answer Correct Answer: C) 10000 V, 0.001 mmHg. 20. ATOMS THAT HAVE SAME MASS NO AND DIFFERENT ATOMIC NO ARE CALLED: A) ISOTOPES. B) ISOBARS. C) ISOTONES. D) ISOMERS. Show Answer Correct Answer: B) ISOBARS. 21. An atom that has a positive or negative charge A) Ion. B) Electron. C) Isotope. D) Element. Show Answer Correct Answer: A) Ion. 22. What is atomic mass? A) Protons + neutrons. B) Protons + electrons. C) Neutrons + electrons. D) Neutrons + quarks. Show Answer Correct Answer: A) Protons + neutrons. 23. Which of the following is the smallest particle that has the properties of an element? A) An electron of carbon. B) A proton of hydrogen. C) An atom of sodium. D) A neutron of helium. Show Answer Correct Answer: C) An atom of sodium. 24. The photoelectric effect only occurs if the light shining on the metal is: A) Coherent. B) Above a threshold intensity. C) Above a threshold frequency. D) Above a threshold wavelength. Show Answer Correct Answer: C) Above a threshold frequency. 25. What prevents an atom from being collapsed? A) The nuclear forces. B) Movement of electrons in discrete energy levels. C) The electron-electron repulsions. D) All of these. Show Answer Correct Answer: B) Movement of electrons in discrete energy levels. ← 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 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 10Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books