This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 45 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 45 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Changes in matter can be described in terms of physical changes and ..... A) Catalyst. B) Energy. C) Activation energy. D) Decomposition. E) Chemical changes. Show Answer Correct Answer: E) Chemical changes. 2. What happens to molecules when the temperature drops or lowers? A) The molecules get closer together. B) The molecules start moving faster. C) The molecules stop moving. D) The molecules become smaller. Show Answer Correct Answer: A) The molecules get closer together. 3. Subatomic particles with no charge but was a mass equal to that of a proton. A) Electron. B) Nucleus. C) Isotopes. D) Neutrons. Show Answer Correct Answer: D) Neutrons. 4. Pure research can lead directly to an application but an application can exist before research is done to explain how it works. A) True. B) False. C) Sometimes. D) Go Zags. Show Answer Correct Answer: A) True. 5. Which is a metal? A) H. B) N. C) Cl. D) V. Show Answer Correct Answer: D) V. 6. Which of the following factors does not effect the rate of dissolving? A) Temperature. B) Agitation (stirring). C) Color. D) Surface Area of solute (size). Show Answer Correct Answer: C) Color. 7. Substance with atoms that are all alike. A) Element. B) Compound. C) Homogeneous mixture. D) Heterogeneous mixture. Show Answer Correct Answer: A) Element. 8. He was the Greek philosopher who thought that all matter is composed of primal element which is air. A) Thales. B) Empedocles. C) Anaximenes. D) Leucippus. Show Answer Correct Answer: C) Anaximenes. 9. He was the Greek philosopher who proposed that all matter is made up of four fundamental elements-earth, water, air, fire. A) Leucippus. B) Epicurus. C) Democritus. D) Empedocles. Show Answer Correct Answer: D) Empedocles. 10. Which of these is an ionic bond? A) Nonmetal+Nonmetal. B) Metal+Nonmetal. C) Metalloid+Metalloid. D) Metal+Metal. Show Answer Correct Answer: B) Metal+Nonmetal. 11. What are the new substances that are formed in a chemical reaction called? A) Reactants. B) Atoms. C) Products. D) Reagents. Show Answer Correct Answer: C) Products. 12. Which of the following correctly matches a compound with its molecular geometry? A) Carbon tetrachloride (CCl4):Tetrahedral. B) Carbon dioxide (CO2):Trigonal pyramidal. C) Ammonia (NH3):Trigonal planar. D) Water (H2O):Linear. Show Answer Correct Answer: A) Carbon tetrachloride (CCl4):Tetrahedral. 13. A heterogeneous mixture consists of two or more phases. A) Always True. B) Sometimes True. C) Never True. D) None of above. Show Answer Correct Answer: A) Always True. 14. A student pours two different solutions into a glass beaker. Which of the following would indicate that a chemical reaction took place between two solutions? A) A change in color of a solution. B) The formation of a precipitate. C) A change in temperature. D) All of the above. Show Answer Correct Answer: D) All of the above. 15. Cations A) Gain electrons, has an overall positive charge. B) Lose electrons, has an overall positive charge. C) Lose electrons, has an overall negative charge. D) Gain electrons, has an overall negative charge. Show Answer Correct Answer: B) Lose electrons, has an overall positive charge. 16. Heat flows from ..... to ..... objects A) Cooler to warmer. B) Warmer to warmer. C) Warmer to cooler. D) Cooler to cooler. Show Answer Correct Answer: C) Warmer to cooler. 17. What is a molecule? A) A group of atoms that are held together by chemical bonds. B) Basic particles of all things living and non-living. C) Forms cell membrane. D) Molecule that carries information. Show Answer Correct Answer: A) A group of atoms that are held together by chemical bonds. 18. Which one of the following Would the following result in a displacement reaction? A) Iron with magnesium chloride. B) Magnesium with iron chloride. C) Iron with Zinc Sulphate. D) Gold with silver nitrate. Show Answer Correct Answer: B) Magnesium with iron chloride. 19. CH4 + 2O2 $\rightarrow$ CO2 + XH2O. What coefficient must be placed in front of water to balance the equation? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: B) 2. 20. A student is conducting an experiment on the effectiveness of solid aluminum hydroxide as an antacid. Which measuring tool would most likely be used to measure out several 7.0 gram samples used during the investigation? A) Electronic balance. B) Beaker. C) Spring scale. D) Graduated cylinder. Show Answer Correct Answer: A) Electronic balance. ← 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