This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom – Quiz 24 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 24 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The size and energy of the orbital is given by ..... quantum number A) Spin. B) Magnetic. C) Subsidary. D) Principle. Show Answer Correct Answer: D) Principle. 2. How many electrons are present in 1 mole of H$_{2}$O A) 6.022 X 10$^{24}$. B) 3 X 6.022 X 10$^{23}$. C) 3 X 6.022 X 10$^{22}$. D) 3 X 6.022 X 10$^{24}$. Show Answer Correct Answer: D) 3 X 6.022 X 10$^{24}$. 3. If frequency required for transition of electron from 2$^{nd}$ orbit to 5$^{th}$ orbit is 4 x 10$^{15}$ Hz, the energy absorbed during the transition is ..... A) 16.5 e V. B) 26.5 e V. C) 16.5 J. D) 26.5 J. Show Answer Correct Answer: A) 16.5 e V. 4. Electronic configuration of atom with atomic number 19 is A) 2, 8, 8. B) 2, 8, 8, 1. C) 2, 8, 9. D) 2, 7, 11. Show Answer Correct Answer: B) 2, 8, 8, 1. 5. What is Pauli Exclusion Principle? A) No 2 electrons have same 4 quantum numbers. B) Placeholder. C) Two electrons in nucleus. D) None of the above. Show Answer Correct Answer: A) No 2 electrons have same 4 quantum numbers. 6. The distance from one point to the next corresponding point on a wave is called the ..... A) Waveform. B) Peak. C) Amplitude. D) Wavelength. Show Answer Correct Answer: D) Wavelength. 7. Which of the following represents the correct electron distribution in magnesium ion? A) 2, 8. B) 2, 8, 1. C) 2, 8, 2. D) 2, 8, 3. Show Answer Correct Answer: A) 2, 8. 8. What causes fine structure in spectra? A) Spin-orbit coupling. B) Nuclear charge. C) Energy difference. D) Energy splitting. Show Answer Correct Answer: A) Spin-orbit coupling. 9. An atom has 10 protons and a mass of 18. It has ..... neutrons A) 10. B) 18. C) 28. D) 8. Show Answer Correct Answer: D) 8. 10. Alpha particle is the nucleus of A) Hydrogen. B) Helium. C) Lithium. D) Berylium. Show Answer Correct Answer: B) Helium. 11. Removing electrons from an atom makes a(n) A) Positive ion. B) Isotope. C) Negative ion. D) New element. Show Answer Correct Answer: A) Positive ion. 12. What is the mass per unit volume of a substance called? A) Density. B) Mass. C) Charge. D) Atom. Show Answer Correct Answer: A) Density. 13. Which of the following atom has maximum number of unpaired electrons? A) Cu(29). B) Zn(30). C) Cr(24). D) Mn(25). Show Answer Correct Answer: C) Cr(24). 14. A negatively charged particle that occupies the space in an atom outside the nucleus is an ..... A) Electron. B) Neutron. C) Proton. D) None of the above. Show Answer Correct Answer: A) Electron. 15. Which particles are positively charged and located in the nucleus of an atom? A) Atom. B) Mass. C) Proton. D) Neutron. Show Answer Correct Answer: C) Proton. 16. Matter is anything that ..... A) Has mass. B) Takes up space. C) Has mass and takes up space. D) Has energy. Show Answer Correct Answer: C) Has mass and takes up space. 17. True or False:An atom's electron cloud is located in the region surrounding the nucleus. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 18. Which of the following species is not isoelectronic with Ne A) Na$^{+}$. B) Na. C) Al$^{3+}$. D) Mg$^{2+}$. Show Answer Correct Answer: B) Na. 19. Assertion (A):It is impossible to determine the exact position and exact momentum of an electron simultaneously.Reason (R):The path of an electron in an atom is clearly defined. A) Both A and R are true and R is the correct explanation of A. B) Both A nd R are true but R is not the correct explanation of A. C) A is true but R is false. D) A is false but R is true. Show Answer Correct Answer: C) A is true but R is false. 20. Which of the following quantum numbers governs the spatial orientation of an atomic orbital? A) Magnetic quantum number. B) Spin quantum number. C) Azimuthal quantum number. D) Principal quantum number. Show Answer Correct Answer: A) Magnetic quantum number. 21. Orbital sublevels, or L, represents: A) Orbital color. B) Orbital shape. C) Electron spin. D) Energy level. Show Answer Correct Answer: B) Orbital shape. 22. What is the total number of orbitals associated with the principal quantum number n = 4? A) 10. B) 16. C) 12. D) 8. Show Answer Correct Answer: B) 16. 23. The charge on an electron is A) 1.602 x 10$^{-19 }$C. B) -1.602 x 10$^{-19 }$C. C) 1.602 x 10$^{19 }$C. D) -1.602 x 10$^{19 }$C. Show Answer Correct Answer: B) -1.602 x 10$^{-19 }$C. 24. Which subatomic particle has a positive charge? A) Proton. B) Neutron. C) Electron. D) Nucleus. Show Answer Correct Answer: A) Proton. 25. An atom is electrically neutral because of the presence of equal number of A) Protons and electrons. B) Protons and neutrons. C) Neutrons and electrons. D) All of these. Show Answer Correct Answer: A) Protons and electrons. ← 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