This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 12 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 12 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A sub-atomic particle that has a positive charge and that is found in the nucleus of an atom A) Electrons. B) Neutrons. C) Protons. D) Ions. Show Answer Correct Answer: C) Protons. 2. The octane number of zero is assigned to A) N-heptane. B) Iso-octane. C) 2-methyl octane. D) 3-methyl octane. Show Answer Correct Answer: A) N-heptane. 3. Hydrogen and carbon form A) Nonpolar covalent bonds. B) Polar covalent bonds. C) Ionic bonds. D) Hydrogen bonds. Show Answer Correct Answer: A) Nonpolar covalent bonds. 4. Calcium carbonate or calcite consists of ..... A) Calcium, carbon, hydrogen. B) Calcium, oxygen, hydrogen. C) Calcium, carbon, oxygen. D) None of above. Show Answer Correct Answer: C) Calcium, carbon, oxygen. 5. Vertical columns of elements that have similar chemical and physical properties due to their outermost electrons A) Periods. B) Groups. C) Symbols. D) Shells. Show Answer Correct Answer: B) Groups. 6. What is an electron cloud? A) Water vapor in the sky that drops rain onto the earth. B) A gathering of people who want to vote. C) The location of electrons circling the nucleus of an atom. D) The center of an atom. Show Answer Correct Answer: C) The location of electrons circling the nucleus of an atom. 7. Which biomolecule includes fats, such as triglycerides, oils, waxes, and steroids (cholesterol); insoluble in water; provides energy storage, insulation, part of cell membrane, and hormones A) Nucleic Acid. B) Lipids. C) Carbohydrate. D) Protein. Show Answer Correct Answer: B) Lipids. 8. Which is the strongest interaction? A) Covalent bonds. B) Ionic bonds. C) Hydrogen bonds. D) Van der Waals forces. Show Answer Correct Answer: A) Covalent bonds. 9. Sharing electrons happens during A) The formation of ions. B) Ionic bonding. C) Covalent bonding. D) Metallic bonding. Show Answer Correct Answer: C) Covalent bonding. 10. What are the number of moles of CO2 which contains 16 g of oxygen? A) 0.25 mole. B) 0.2 mole. C) 0.4 mole. D) 0.5 mole. Show Answer Correct Answer: D) 0.5 mole. 11. What is the chemical name of table salt? A) Sodium nitrate. B) Calcium chloride. C) Sodium chloride. D) Ammonium chloride. Show Answer Correct Answer: C) Sodium chloride. 12. What is the hardest form of carbon? A) Coke. B) Graphite. C) Charcoal. D) Diamond. Show Answer Correct Answer: D) Diamond. 13. How many moles of silver atoms are in 1.8 X 1020 atoms of silver? A) 3.0 X 10-4. B) 3.3 X 10-3. C) 3.0 X 102. D) 1.1 X 1044. Show Answer Correct Answer: A) 3.0 X 10-4. 14. How many moles are 2.85 x 1018 atoms of iron? A) 4.73 x 10-6 moles. B) 1.72 x 1042 moles. C) 1.72 x 10-42 moles. D) 4.73 x 106 moles. Show Answer Correct Answer: A) 4.73 x 10-6 moles. 15. Hydrogen and nitrogen form A) Ionic bonds. B) Polar covalent bonds. C) Nonpolar covalent bonds. D) None of above. Show Answer Correct Answer: B) Polar covalent bonds. 16. What is two or more atoms held together by chemical bonds? A) Adenosine triphosphate (ATP). B) Carbon. C) Molecule. D) Compound. Show Answer Correct Answer: C) Molecule. 17. If an atom has 3 electrons, how many protons does it have? A) 1. B) 2. C) 4. D) 3. Show Answer Correct Answer: D) 3. 18. What electron configuration matches an oxygen ion? A) 1s22s22p63s2, 3p64s23d104p5. B) 1s22s22p4. C) 1s22s22p6. D) 1s22s22p63s23p64s23d1. Show Answer Correct Answer: C) 1s22s22p6. 19. What electron configuration matches an oxygen atom? A) 1s22s22p63s2, 3p64s23d104p5. B) 1s22s22p4. C) 1s22s22p6. D) 1s22s22p63s23p64s23d1. Show Answer Correct Answer: B) 1s22s22p4. 20. Elements in Group 18 do not normally form chemical bonds because ..... A) They are not found on the Earth. B) They do not have any valence electrons. C) They have a complete set of valence electrons. D) They are all gases. Show Answer Correct Answer: C) They have a complete set of valence electrons. ← 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