This quiz works best with JavaScript enabled. Home > Class 9 > Class 9 Science Chapter 3 Atoms And Molecules – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 3 Atoms And Molecules Quiz 8 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Calculate the molecular mass of HNO3 A) 68. B) 42u. C) Stab. D) 65im. Show Answer Correct Answer: C) Stab. 2. Which of the following has the maximum number of particles? A) 8 g of CH$_{4}$. B) 4.4 g of CO $ _ {2} $. C) 34.2 g of C$_{12}$H$_{22}$O$_{11}$. D) 2 g of H$_{2}$. Show Answer Correct Answer: D) 2 g of H$_{2}$. 3. The matter is made up of ..... A) Compounds. B) Elements. C) Atoms. D) Ions. Show Answer Correct Answer: C) Atoms. 4. The Latin name for 'Lead' is A) Ring. B) Lead. C) Wolfram. D) Hydrargyrum. Show Answer Correct Answer: B) Lead. 5. The formula unit mass of Al$_{2}$SO$_{3}$ is A) 236 u. B) 432 u. C) 342 u. D) 180 u. Show Answer Correct Answer: C) 342 u. 6. 4 grams of hydrogen reacts with some oxygen to make 36 grams of water. Figure out how much oxygen must have been used by applying the law of conservation of mass? A) 32 grams. B) 36 grams. C) 4 grams. D) 34 grams. Show Answer Correct Answer: A) 32 grams. 7. If Element A has more atomic mass than Element B, then 100 g of Element A will have more particles than 100 g of Element B. (True/False) A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 8. The volume of an atom is 10$^{y}$ times the volume of nucleus. Then y is ..... A) 5. B) 10. C) 15. D) 20. Show Answer Correct Answer: C) 15. 9. Measure mainly of the nuclear particles:protons + neutrons A) Subatomic Particles. B) Atomic Number. C) Atomic Mass. D) Gluons. Show Answer Correct Answer: C) Atomic Mass. 10. The atomic symbol of silver is ..... A) And. B) S. C) Au. D) Ag. Show Answer Correct Answer: D) Ag. 11. Particles present in an atom are called? A) Anatomic particles. B) Preatomic particles. C) Subatomic particles. D) None of the above. Show Answer Correct Answer: C) Subatomic particles. 12. All noble gases have1. completely filled orbit2. monoatomic3. unreactive4. all the above A) 3. B) 2. C) 4. D) 1. Show Answer Correct Answer: C) 4. 13. Molecules and compounds are created when multiple atoms bond together, but how are they different? A) Compounds have to have atoms from different elements bonded together. B) Molecules have to have atoms from different elements bonded together. C) They are the same and there is no difference. D) Molecules are building blocks of compounds. Show Answer Correct Answer: A) Compounds have to have atoms from different elements bonded together. 14. The chemical formula of Bismuth Phosphate is A) Would $ _ {2} $ (after $ _ {4} $) $ _ {3} $. B) B IPO$_{4}$. C) Would $ _ {3} $ after $ _ {4} $. D) Would (after $ _ {4} $) $ _ {3} $. Show Answer Correct Answer: B) B IPO$_{4}$. 15. The atomocity of Ethanol is A) 2. B) 5. C) 7. D) 9. Show Answer Correct Answer: D) 9. 16. Molecular formula of copper and bromine is A) Cubr2. B) CUBR. C) Cu2br. D) CuBr. Show Answer Correct Answer: A) Cubr2. 17. Molar mass of C2H6 =?Given (C=12g ; H=1g) A) 30g. B) 15g. C) 32g. D) None of the above. Show Answer Correct Answer: A) 30g. 18. What is the smallest unit of a chemical element that retains its chemical properties? A) Atom. B) Molecule. C) Compound. D) Ion. Show Answer Correct Answer: A) Atom. 19. Which of the following is a chemical symbol? A) H$_{2}$O. B) O. C) NaCl. D) FeO. Show Answer Correct Answer: B) O. 20. The positive particles of an atom are A) Electrons. B) Positrons. C) Neutrons. D) Protons. Show Answer Correct Answer: D) Protons. 21. What is the term for combining 2 or more atoms together? A) Atoms. B) Elements. C) Molecules. D) Compounds. Show Answer Correct Answer: C) Molecules. 22. Which of the following is NOT a rule for matter? A) All matter is made of atoms. B) Atoms bond to other atoms to form compounds. C) Atoms are on the macro scale. D) Atoms last forever. Show Answer Correct Answer: C) Atoms are on the macro scale. 23. Which of these items is made up of one or more molecules? A) Gold. B) Hydrogen. C) Salt. D) Neon. Show Answer Correct Answer: C) Salt. 24. The molecule having an atomicity of 4 is: A) Sulphate molecule. B) Ozone molecule. C) Phosphorous molecule. D) Methane molecule. Show Answer Correct Answer: C) Phosphorous molecule. 25. According to Daltons's Atomic theory, "Atoms are indivisible particles which can neither be destroyed nor created." postulate describes A) Law of Conservation of Mass. B) Law of Constant Proportion. C) All the above. D) None of the above. Show Answer Correct Answer: A) Law of Conservation of Mass. ← PreviousNext →Related QuizzesClass 9 Science Chapter 3 Atoms And Molecules Quiz 1Class 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 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