This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 16 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 16 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The number of protons present in the nucleus of an atom determines the ..... A) Atomic number. B) Mass number. C) Valency. D) None of the above. Show Answer Correct Answer: A) Atomic number. 2. Which of the following covalent compounds has a chemical formula of NF3? A) Dinitrogen tetrahydride. B) Dinitirogen pentoxide. C) Nitrogen tribromide. D) Nitrogen trifluoride. Show Answer Correct Answer: D) Nitrogen trifluoride. 3. Objects float or sink as a result of this property A) Density. B) Solubility. C) Composition. D) None of above. Show Answer Correct Answer: A) Density. 4. A mixture that is unevenly distributed, has 2 phases A) Heterogeneous mixture. B) Homogeneous mixture. C) Pure substances. D) Alloys. Show Answer Correct Answer: A) Heterogeneous mixture. 5. What type of bond results from shared electrons? A) Covalent Bond. B) Ionic Bond. C) Hydrogen Bond. D) Water Bond. Show Answer Correct Answer: A) Covalent Bond. 6. Which of the following is a physical property of metals? A) Shiny. B) Bendable. C) Conducts heat. D) All of the above. Show Answer Correct Answer: D) All of the above. 7. What is the result of the reaction between potassium bromide and ammonium sulfide? A) Potassium sulfide precipitates. B) Ammonium bromide precipitates. C) Potassium ammonium precipitates. D) No precipitate is formed. Show Answer Correct Answer: D) No precipitate is formed. 8. The luster of a metal is due to A) High density. B) High polishing. C) Chemical inertness. D) Presence of free electrons. Show Answer Correct Answer: D) Presence of free electrons. 9. Fluorine will form what type of ion? A) Neutral. B) Negative. C) Positive. D) None of above. Show Answer Correct Answer: B) Negative. 10. How many different bonds can every atom of carbon make? A) 4 single bonds. B) 2 single and 1 double bond. C) 1 single and 1 triple. D) Any are correct. Show Answer Correct Answer: D) Any are correct. 11. Where are electrons located? A) In the electron clouds. B) In the nucleus. C) In the protons. D) Paired with the neutrons. Show Answer Correct Answer: A) In the electron clouds. 12. How many electrons are in a neutral atom of sodium-23? A) 22. B) 11. C) 12. D) 23. Show Answer Correct Answer: B) 11. 13. How many total ATOMS are in the following compound:2C2H4O2 A) 3. B) 8. C) 10. D) 16. Show Answer Correct Answer: D) 16. 14. When 2.02 X 1023 is multiplied by 3.1 X 10-31, the product is A) 6.3 X 10-8. B) 6.3 X 108. C) 6.3 X 1054. D) 6.3 X 10-54. Show Answer Correct Answer: A) 6.3 X 10-8. 15. The metal used to recover copper from a solution of copper sulphate is? A) Fe. B) Ag. C) Hg. D) Na. Show Answer Correct Answer: A) Fe. 16. Avogadro's number is defined as the number of particles in A) One mol of pure substance. B) One liter of pure substance. C) One kilogram of pure substance. D) One gram of pure substance. Show Answer Correct Answer: A) One mol of pure substance. 17. Moving down on the periodic table increases the number of ..... A) Valence electrons. B) Electron rings. C) Element. D) Periodic. Show Answer Correct Answer: B) Electron rings. 18. Which is the correct form of writing the chemical formula for Ferous sulfate or Iron (II) sulfate? A) Fe2SO3. B) FeSO3. C) FeSO4. D) Fe2SO4. Show Answer Correct Answer: C) FeSO4. 19. What is the pH of water? A) 0. B) 4. C) 7. D) 14. Show Answer Correct Answer: C) 7. 20. A subatomic particle, contained in the nucleus of an atom, having the same mass as a proton but no electrical charge A) Proton. B) Neutron. C) Electron. D) None of above. Show Answer Correct Answer: B) Neutron. ← 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