This quiz works best with JavaScript enabled. Home > Class 9 > Class 9 Science Chapter 3 Atoms And Molecules – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 3 Atoms And Molecules Quiz 1 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the relative atomic mass of Carbon? A) 6. B) 12. C) 18. D) 7. Show Answer Correct Answer: B) 12. 2. What is the atomic mass of chlorine? A) 35.5 u. B) Grate. C) 35.5d. D) 30.2 u. Show Answer Correct Answer: A) 35.5 u. 3. Which term defines a substance that is formed by the combination of elements using fixed amounts? A) Atom. B) Compounds compound. C) Element. D) Molecule. Show Answer Correct Answer: B) Compounds compound. 4. Mass of 1 mole of ethane (C$_{2}$H$_{6}$) is A) 30 g. B) 30 u. C) 30. D) None. Show Answer Correct Answer: A) 30 g. 5. "Atoms combine in fixed ratio to form compounds." This statement is supported by: A) Law of conservation of mass. B) Law of definite proportion. C) All the above. D) None of the above. Show Answer Correct Answer: B) Law of definite proportion. 6. The flow of electrons from one atom to another is A) Energy. B) Heat. C) Electricity. D) Light. Show Answer Correct Answer: C) Electricity. 7. How many atoms are in TWO H2O molecules? A) 2. B) 4. C) 6. D) 8. Show Answer Correct Answer: C) 6. 8. Atomic number of oxygen is A) 4. B) 6. C) 8. D) 12. Show Answer Correct Answer: C) 8. 9. What are the building blocks of all matter A) Atoms. B) Molecules. C) Both A and B. D) Only A. Show Answer Correct Answer: C) Both A and B. 10. Modern day of chemical symbols follow whose rules? A) IUPAC(International union for pure and applied chemistry). B) Dalton. C) Berzelius. D) None of these. Show Answer Correct Answer: A) IUPAC(International union for pure and applied chemistry). 11. Which of the following statement is not correct?1. atoms are neutral2. atoms are basic units of matter3. atoms aggregate to form large molecules4.atoms exist indepedently A) 1. B) 3. C) 2. D) 4. Show Answer Correct Answer: D) 4. 12. All matter is made of A) Energy. B) Atoms. C) Electrons. D) Compounds. Show Answer Correct Answer: B) Atoms. 13. Where is the proton found? A) Orbit. B) Nucleus. C) All the above. D) None of the above. Show Answer Correct Answer: B) Nucleus. 14. The smallest particle of a substance is ..... A) Atom. B) Element. C) Molecule. D) Compound. Show Answer Correct Answer: A) Atom. 15. In the video, what 2 important components is the Universe made up of? A) Water & air. B) Land & water. C) Atoms & molecules. D) Legos & kinetics. Show Answer Correct Answer: C) Atoms & molecules. 16. The valence electrons present in Neon are A) 1. B) 2. C) 6. D) 8. Show Answer Correct Answer: D) 8. 17. How many molecules are in 2.00 moles of H$_{2}$O? A) 124x10$^{24 }$molecules of H$_{2}$O. B) 1.20x10$^{23 }$molecules of H$_{2}$O. C) 12.04 x10$^{23}$ molecules H$_{2}$O. D) 124. Show Answer Correct Answer: C) 12.04 x10$^{23}$ molecules H$_{2}$O. 18. Heaviest particle in the atom is? A) Proton. B) Electron. C) Neutron. D) None of the above. Show Answer Correct Answer: C) Neutron. 19. H$_{2}$SO$_{4 contains how many atoms?}$ A) 3. B) 4. C) 6. D) 7. Show Answer Correct Answer: D) 7. 20. The repeating structure of table salt is in the shape of a A) Cube. B) Sphere. C) Cone/. D) Miscellaneous. Show Answer Correct Answer: A) Cube. 21. Which of the following is the correct pair of atom and it's atomic symbol? A) Sulphur-Sul. B) Potassium-p. C) Phosphorus-P. D) Sodium-S. Show Answer Correct Answer: C) Phosphorus-P. 22. Identify the Symbol of Calcium A) Na. B) Mg. C) Ca. D) Cl. Show Answer Correct Answer: C) Ca. 23. A mole of Neon contains 6.02 x 10$^{23 }$ ..... A) Atoms. B) Formula units. C) Ions. D) Molecules. Show Answer Correct Answer: A) Atoms. 24. Charges of Neutron, Electron and Proton are? A) + 0-. B) -+ 0. C) 0-+. D) 0 +-. Show Answer Correct Answer: C) 0-+. 25. Q6) KCl molecule is made up of which of the following ions? A) A) K cation and Cl anion. B) B) K anion and Cl cation. C) C) Both K and Cl cations. D) Both K and Cl anions. Show Answer Correct Answer: A) A) K cation and Cl anion. Next →Related QuizzesClass 9 Science Chapter 3 Atoms And Molecules Quiz 2Class 9 Science Chapter 3 Atoms And Molecules Quiz 3Class 9 Science Chapter 3 Atoms And Molecules Quiz 4Class 9 Science Chapter 3 Atoms And Molecules Quiz 5Class 9 Science Chapter 3 Atoms And Molecules Quiz 6Class 9 Science Chapter 3 Atoms And Molecules Quiz 7Class 9 Science Chapter 3 Atoms And Molecules Quiz 8Class 9 Science Chapter 3 Atoms And Molecules Quiz 9Class 9 Science Chapter 3 Atoms And Molecules Quiz 10Class 9 Science Chapter 3 Atoms And Molecules Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books