This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 10 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 10 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Organized the elements in the periodic table A) John Dalton. B) Dimitri Mendeleev. C) James Chadwick. D) JJ Thompson. Show Answer Correct Answer: B) Dimitri Mendeleev. 2. The smallest particle of any particular type of matter is known by which of the following terms? A) Compound. B) Atom. C) Chemical. D) Element. Show Answer Correct Answer: B) Atom. 3. "CHNOPS" stands for A) Mrs. D'Amore's dog. B) The six members of One Direction. C) The most important elements in nature. D) What the cafe is serving for lunch tomorrow. Show Answer Correct Answer: C) The most important elements in nature. 4. For sodium to transform from a neutral atom to a positive ion, it must A) Gain an electron. B) Gain a proton. C) Lose an electron. D) Lose a proton. Show Answer Correct Answer: C) Lose an electron. 5. What is a valence electron? A) An electron that is found in the outermost orbital of an atom. B) An electron found in the innermost orbital of an atom. C) An electron found in the middle orbital. D) None of above. Show Answer Correct Answer: A) An electron that is found in the outermost orbital of an atom. 6. Given the reaction:H2SO4 + 2LiOH yields Li2SO4 + 2HOHWhich compound is a salt? A) LiOH. B) Li2SO4. C) H2SO4. D) HOH. Show Answer Correct Answer: B) Li2SO4. 7. What explains the very high melting and boiling point of water A) Strong dipole-dipole bonds between water molecules. B) Strong hydrogen bonds between water molecules. C) Dispersion forces which are present in all molecules. D) Asymmetrical shape of the polar bonds. Show Answer Correct Answer: B) Strong hydrogen bonds between water molecules. 8. Which biomolecule is made of nucleotides and contain you DNA? A) Carbohydrate. B) Lipids. C) Protein. D) Nucleic Acid. Show Answer Correct Answer: D) Nucleic Acid. 9. Sulfur hexafluoride is an example of a ..... A) Monatomic ion. B) Polyatomic ion. C) Binary compound. D) Polyatomic compound. Show Answer Correct Answer: C) Binary compound. 10. Which has more molecules? This is a trick question! A) 2 mole NaCl. B) 3 mole NaF. C) 1 mole Cl2. D) They're are all the same. Show Answer Correct Answer: C) 1 mole Cl2. 11. Which of the following is found in the nucleus of an atom? A) Electrons. B) Neutrons. C) The center of an atom, composed of protons and neutrons. D) Molecules. Show Answer Correct Answer: C) The center of an atom, composed of protons and neutrons. 12. It refers to the ability to shine and to reflect light. A) Malleability. B) Ductility. C) Conductors of heat. D) Luster. Show Answer Correct Answer: D) Luster. 13. Balance the following: ..... H2SO4 + ..... NaNO2 $\rightarrow$ ..... HNO2 + ..... Na2SO4 A) 1, 1, 2, 1. B) 1, 2, 2, 1. C) 2, 3, 3, 2. D) 4, 3, 2, 1. Show Answer Correct Answer: B) 1, 2, 2, 1. 14. Atoms are in A) Cats. B) Boxes. C) Knives. D) All of the above. Show Answer Correct Answer: D) All of the above. 15. Which of the following gases is the most toxic? A) Acetic acid. B) Carbon dioxide. C) Sulphur dioxide. D) Carbon monoxide. Show Answer Correct Answer: D) Carbon monoxide. 16. What is the charge of a proton? A) Neutral. B) Depends on the location. C) Positive. D) Depends on the size. Show Answer Correct Answer: C) Positive. 17. Which statement about the alkali metals is correct A) Located on the left most column of the periodic table. B) Extremely nonreactive. C) Usually gases. D) Form negative ions. Show Answer Correct Answer: A) Located on the left most column of the periodic table. 18. Salinity means A) Savory. B) Saltiness. C) Soapy. D) Acidity. Show Answer Correct Answer: B) Saltiness. 19. Which of the following is not a carbon compound? A) Carbohydrates. B) Lipids. C) Nucleic Acids. D) Vitamins. Show Answer Correct Answer: D) Vitamins. 20. Adenosine triphosphate; gives energy to cells A) ATP. B) Enzymes. C) Fats. D) Sugar. Show Answer Correct Answer: A) ATP. ← 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