This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 29 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 29 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which combination of temperature and pressure correctly describes standard temperature and pressure, STP? A) 0C$^ \circ$ and 101.3 kPa. B) 1C$^ \circ$ and 0 kPa. C) 0C$^ \circ$ and 22.4 kPa. D) 100C$^ \circ$ and 100 kPa. Show Answer Correct Answer: A) 0C$^ \circ$ and 101.3 kPa. 2. What element is located in group 2, period 3? A) Mg. B) Sc. C) Be. D) Na. Show Answer Correct Answer: A) Mg. 3. A molecule of H2, S, O4 contains how many atoms? A) 3. B) 6. C) 7. D) 8. Show Answer Correct Answer: C) 7. 4. The substance that does the dissolving A) Solute. B) Solvent. C) Solution. D) Miscibility. Show Answer Correct Answer: B) Solvent. 5. If an atom has 12 positively charged subatomic particles, which of the following must it also have to be considered a neutral atom? A) 12 neutrons. B) 12 electrons. C) 12 protons. D) 24 protons and neutrons. Show Answer Correct Answer: B) 12 electrons. 6. The number of significant figures in the measurement 170.040 km is A) Three. B) Four. C) Five. D) Six. Show Answer Correct Answer: D) Six. 7. A magnesium atom has an atomic number of 12, a mass number of 25, and a +2 charge. This atom would contain ..... protons, ..... neutrons, and ..... electrons. A) 12; 25; 2. B) 12; 13; 14. C) 12; 13; 10. D) None of above. Show Answer Correct Answer: C) 12; 13; 10. 8. How many oxygen atoms are in the compound C3H5(OH)3 A) 6. B) 5. C) 2. D) 3. Show Answer Correct Answer: D) 3. 9. Which of these is an ionic compound? A) H2O. B) O2. C) Li2O. D) Hg. Show Answer Correct Answer: C) Li2O. 10. An-ate or-ite at the end of a compound name usually indicates that the compound contains ..... A) Fewer electrons than protons. B) Neutral molecules. C) Only two elements. D) A polyatomic anion. Show Answer Correct Answer: D) A polyatomic anion. 11. Matter is made up of tiny indestructible particles called A) Proton. B) Atom. C) Molecules. D) None of above. Show Answer Correct Answer: B) Atom. 12. Which of the following tells you that a chemical change has occured? A) Change in color. B) Change in shape. C) Melting. D) Vaporizing. Show Answer Correct Answer: A) Change in color. 13. What is the atomic mass for the element Dy? A) 163. B) 66. C) 165. D) 229. Show Answer Correct Answer: A) 163. 14. The gaseous state of a substance which is normally a solid or liquid is a A) Phase. B) Vapor. C) Gas. D) Plasma. Show Answer Correct Answer: B) Vapor. 15. Hydrocarbons are compound that contain A) Carbon only. B) Carbon, Oxygen, and Hydrogen only. C) Carbon and Hydrogen only. D) Carbon, Oxygen, and Nitrogen. Show Answer Correct Answer: C) Carbon and Hydrogen only. 16. A definite shape and volume A) Solid. B) Liquid. C) Gas. D) None of above. Show Answer Correct Answer: A) Solid. 17. Gold is an example of a(n) A) Pure element. B) Pure compound. C) Pure mixture. D) None of above. Show Answer Correct Answer: A) Pure element. 18. Which pair of substances is miscible? A) Water (liquid) and vinegar (liquid). B) Ethanol (and alcohol) and sodium chloride (solid). C) Water and sodium chloride (solid). D) Oil and water. Show Answer Correct Answer: A) Water (liquid) and vinegar (liquid). 19. The formula CO represents one ..... of carbon monoxide. A) Atom. B) Molecule. C) Ion. D) Isotope. Show Answer Correct Answer: B) Molecule. 20. A change in which the atoms or molecules in a substance stay the same A) Matter. B) Mixture. C) Physical Change. D) Chemical Change. Show Answer Correct Answer: C) Physical Change. ← PreviousNext →Related QuizzesScience QuizzesChemistry Quiz 1Chemistry Quiz 2Chemistry Quiz 3Chemistry Quiz 4Chemistry Quiz 5Chemistry Quiz 6Chemistry Quiz 7Chemistry Quiz 8Chemistry Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books