This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry Basics > Chemistry – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 5 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Colloids are A) Clear mixtures that have fully dissolved parts. B) A mixture that will separate into different parts when left to settle. C) A suspension that appears cloudy and scatters light. D) A solution that has all parts visible. Show Answer Correct Answer: C) A suspension that appears cloudy and scatters light. 2. $ X\left(No_3\right)_3$ what is the charge of X A) 0. B) -1. C) -3. D) +3. Show Answer Correct Answer: D) +3. 3. He was the Greek philosopher who thought that all matter is composed of water. A) Empedocles. B) Aristotle. C) Thales. D) Anaximenes. Show Answer Correct Answer: C) Thales. 4. The mass of ethanedioic acid, H2C2O4 in 250 cm3 of0.25 mol dm-3 solution is A) 5.625 g. B) 11.250 g. C) 22.500 g. D) 33.750 g. Show Answer Correct Answer: A) 5.625 g. 5. In general, metals react by ..... A) Sharing valence electrons. B) Gaining valence electrons. C) Losing valence electrons. D) Sometimes gaining and sometimes losing valence electrons. Show Answer Correct Answer: C) Losing valence electrons. 6. The carbon bearing the unpaired electron in a simple alkyl free radical is ..... hybridized A) Sp. B) Sp2. C) Sp3. D) Sp2d. Show Answer Correct Answer: B) Sp2. 7. Which of the following statements about alkenes is not correct? A) They have reactive double bonds. B) They can form addition polymers. C) They react mainly by substitution. D) They can react with water to form alcohols. Show Answer Correct Answer: C) They react mainly by substitution. 8. A reaction in which energy is given off or released. A) Endothermic. B) Exothermic. C) Chemical. D) Physical. Show Answer Correct Answer: B) Exothermic. 9. Elements combine chemically to form ..... A) Solutions. B) Pure Substances. C) Compounds. D) Mixtures. Show Answer Correct Answer: C) Compounds. 10. A substance formed by two or more different elements defines a/an A) Mixture. B) Molecule. C) Compound. D) None of above. Show Answer Correct Answer: C) Compound. 11. The characteristics or properties of metals include A) Shiny and solid. B) Ductile and malleable. C) Lose electrons. D) All of the above. Show Answer Correct Answer: D) All of the above. 12. Which is the following is NOT a sign of a chemical change? A) Releasing a gas. B) Releasing bubbles. C) Changing state. D) Rearranging atoms. Show Answer Correct Answer: C) Changing state. 13. A nugget of gold is an example of: A) Compound. B) Element. C) Solution. D) None of above. Show Answer Correct Answer: B) Element. 14. Which of these is NOT the correct way to read the symbol in a chemical equation? A) (g) = grams. B) (aq) = solution. C) (s) = solid. D) (l) = liquid. Show Answer Correct Answer: A) (g) = grams. 15. A vapor is a gaseous substance that is a liquid at room temperature. A) Always True. B) Sometimes True. C) Never True. D) None of above. Show Answer Correct Answer: B) Sometimes True. 16. Sodium (Na) is a highly reactive element. Which characteristic of sodium is responsible for its reactivity? A) It has 11 protons. B) Its atomic mass is 23. C) It is a nonmetal. D) It has one valence electron. Show Answer Correct Answer: D) It has one valence electron. 17. Which of the following elements must be present in any organic compound? A) Carbon. B) Oxygen. C) Potassium. D) Hydrogen. Show Answer Correct Answer: A) Carbon. 18. Glucose + oxygen $\rightarrow$ water + energy + carbon dioxide is an example of A) Combustion. B) Cellular Respiration. C) Corrosion. D) Photosythesis. Show Answer Correct Answer: B) Cellular Respiration. 19. Crisco is an example of what type of fat? A) Monounsaturated. B) Trans. C) Polyunsaturated. D) Saturated. Show Answer Correct Answer: B) Trans. 20. A material with a constant composition. A) Substance. B) Mixture. C) Solution. D) Heterogeneous. Show Answer Correct Answer: A) Substance. ← PreviousNext →Related QuizzesChemistry QuizzesScience QuizzesChemistry Quiz 1Chemistry Quiz 2Chemistry Quiz 3Chemistry Quiz 4Chemistry Quiz 6Chemistry Quiz 7Chemistry Quiz 8Chemistry Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books