This quiz works best with JavaScript enabled. Home > General Knowledge > Science > Chemistry > Chemistry Basics > Chemistry – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 2 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The measurement of how much mass of a substance is contained in a given volume A) Compound. B) Volume. C) Density. D) Mixture. Show Answer Correct Answer: C) Density. 2. Which one of the following is a chemicalproperty of matter? A) It's melting point. B) It's boiling point. C) Whether it burns. D) It's density. Show Answer Correct Answer: C) Whether it burns. 3. What happens in ALL chemical changes? A) A new substance is formed. B) An explosion. C) Bubbles are produced. D) Change in state of matter. Show Answer Correct Answer: A) A new substance is formed. 4. How many electrons should Sulfur have around its Lewis dot model? A) 5. B) 8. C) 7. D) 6. Show Answer Correct Answer: D) 6. 5. Which of the following is a synthesis reaction? A) 2NO + O2 $\rightarrow$ 2NO2. B) 2K + 2H2O $\rightarrow$ 2KOH + H2. C) 2H2O $\rightarrow$ 2H2 + O2. D) CH4 + 2O2 $\rightarrow$ CO2 + 2H2O. Show Answer Correct Answer: A) 2NO + O2 $\rightarrow$ 2NO2. 6. ..... is the branch of chemistry that would study enzymes used in the digestion of food. A) Inorganic Chemistry. B) Biochemistry. C) Physical Chemistry. D) None of above. Show Answer Correct Answer: B) Biochemistry. 7. Carbohydrates are made up of three of the six major molecules found in living things. The general chemical formula for a carbohydrate is CH2O. Which elements combine to make a carbohydrate? A) Copper and cobalt. B) Chlorine and oxygen. C) Carbon, helium, and oxygen. D) Carbon, hydrogen, and oxygen. Show Answer Correct Answer: D) Carbon, hydrogen, and oxygen. 8. Which branch of chemistry would NOT be involved in analyzing the composition of medicines and research how it reacts in the body. (Select all that apply) A) Analytical Chemistry. B) Biochemistry. C) Inorganic Chemistry. D) None of above. Show Answer Correct Answer: C) Inorganic Chemistry. 9. My glass of ice water is sitting in the sun and has droplets of water on the outside of the glass. What is happening? A) Melting. B) Freezing. C) Evaporation. D) Condensation. Show Answer Correct Answer: D) Condensation. 10. What is the chemical symbol of Oxygen? A) O. B) OH. C) H2O. D) H. Show Answer Correct Answer: A) O. 11. Which of the following symbols shows only ONE element? A) KF. B) CU. C) Ar. D) WO. Show Answer Correct Answer: C) Ar. 12. ..... is the branch of chemistry that would focus on chemicals made from carbon-containing building blocks. A) Biochemistry. B) Inorganic Chemistry. C) Organic Chemistry. D) Analytical Chemistry. Show Answer Correct Answer: C) Organic Chemistry. 13. Glucose (C6H12O6) and sucrose (C12H22O11) are both sugars produced by plants and consumed by animals for energy. Which best describes glucose and sucrose? A) They are the same substance. B) They are mixtures with the same chemical formula. C) They are compounds made up of the same elements. D) They have the same hydrogen to carbon ratio and form a crystalline structure. Show Answer Correct Answer: C) They are compounds made up of the same elements. 14. Which event is describing a chemical change? A) A bicycle rusts. B) A soccer ball hits a window. C) Nail polish chips. D) You brush your hair. Show Answer Correct Answer: A) A bicycle rusts. 15. Branch of chemistry that is concerned with the study of structure, composition, and chemical reactions of substances in living systems. A) Inorganic Chemistry. B) Biochemistry. C) Physical Chemistry. D) Analytical Chemistry. Show Answer Correct Answer: B) Biochemistry. 16. Why is transportation an issue for the textile industry? A) The industry prefers to keep the textiles in refrigerated transportation. B) Excessive consumption of non-renewable fuel. C) Textile production units is generally close to the the consumer point. D) None of the above. Show Answer Correct Answer: B) Excessive consumption of non-renewable fuel. 17. Salad is an example of ..... A) A mixutre. B) An element. C) A compound. D) None of above. Show Answer Correct Answer: A) A mixutre. 18. Which of these is a chemical change? A) Melting butter. B) Mixing milk and chocolate syrup. C) Breaking glass. D) Burning fuel. Show Answer Correct Answer: D) Burning fuel. 19. $ X\left(No_3\right)_3$ what is the charge of X A) 0. B) -1. C) +3. D) -3. Show Answer Correct Answer: C) +3. 20. He was the Greek philosopher who thought that all matter is composed of water. A) Thales. B) Empedocles. C) Aristotle. D) Anaximenes. Show Answer Correct Answer: A) Thales. 21. The mass of ethanedioic acid, H2C2O4 in 250 cm3 of0.25 mol dm-3 solution is A) 33.750 g. B) 22.500 g. C) 11.250 g. D) 5.625 g. Show Answer Correct Answer: D) 5.625 g. 22. 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. 23. The carbon bearing the unpaired electron in a simple alkyl free radical is ..... hybridized A) Sp2d. B) Sp3. C) Sp2. D) Sp. Show Answer Correct Answer: C) Sp2. 24. Which of the following statements about alkenes is not correct? A) They can form addition polymers. B) They have reactive double bonds. 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. 25. A reaction in which energy is given off or released. A) Exothermic. B) Chemical. C) Physical. D) Endothermic. Show Answer Correct Answer: A) Exothermic. 26. Elements combine chemically to form ..... A) Compounds. B) Solutions. C) Pure Substances. D) Mixtures. Show Answer Correct Answer: A) Compounds. 27. 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. 28. 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. 29. Which is the following is NOT a sign of a chemical change? A) Changing state. B) Releasing a gas. C) Rearranging atoms. D) Releasing bubbles. Show Answer Correct Answer: A) Changing state. 30. A nugget of gold is an example of: A) Compound. B) Element. C) Solution. D) None of above. Show Answer Correct Answer: B) Element. 31. Which of these is NOT the correct way to read the symbol in a chemical equation? A) (s) = solid. B) (l) = liquid. C) (g) = grams. D) (aq) = solution. Show Answer Correct Answer: C) (g) = grams. 32. 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. 33. Sodium (Na) is a highly reactive element. Which characteristic of sodium is responsible for its reactivity? A) It has one valence electron. B) It has 11 protons. C) Its atomic mass is 23. D) It is a nonmetal. Show Answer Correct Answer: A) It has one valence electron. 34. Which of the following elements must be present in any organic compound? A) Potassium. B) Hydrogen. C) Oxygen. D) Carbon. Show Answer Correct Answer: D) Carbon. 35. Glucose + oxygen $\rightarrow$ water + energy + carbon dioxide is an example of A) Cellular Respiration. B) Combustion. C) Corrosion. D) Photosythesis. Show Answer Correct Answer: A) Cellular Respiration. 36. Crisco is an example of what type of fat? A) Trans. B) Polyunsaturated. C) Saturated. D) Monounsaturated. Show Answer Correct Answer: A) Trans. 37. A material with a constant composition. A) Solution. B) Heterogeneous. C) Mixture. D) Substance. Show Answer Correct Answer: D) Substance. 38. ..... are things you can observe and describe about matter without changing it chemically. A) Chemical properties. B) Chemical changes. C) Physical changes. D) Physical properties. Show Answer Correct Answer: D) Physical properties. 39. All chemical reactions need a certain amount of ..... to get started. A) Decomposition. B) Chemical changes. C) Catalyst. D) Activation energy. E) Energy. Show Answer Correct Answer: D) Activation energy. 40. Branch of chemistry that is concerned with the study of structure, properties, composition, and reactions of carbon-containing compounds. A) Biochemistry. B) Analytical Chemistry. C) Organic Chemistry. D) Inorganic Chemistry. Show Answer Correct Answer: C) Organic Chemistry. 41. A group of students are testing several solutions to determine if they are acidic or basic. Which piece(s) of laboratory safety equipment should be worn during the investigation? A) Goggles. B) Goggles and gloves. C) Goggles and aprons. D) Goggles, gloves, and aprons. Show Answer Correct Answer: D) Goggles, gloves, and aprons. 42. Give the name of this compound ..... C3H8 A) Butene. B) Propene. C) Butane. D) Propane. Show Answer Correct Answer: D) Propane. 43. A characteristic of matter that you can observe or measure without changing the identity of the matter A) Physical property. B) Physical change. C) Chemical change. D) Chemical property. Show Answer Correct Answer: A) Physical property. 44. Two science studentsare setting up a science experiment to determine the qualities of an unknownclear liquid. They gather the necessarymaterials to make their tests, including blue litmus paper. Why do they need blue litmus paper? A) Blue litmus paperis used when working with acid to clean up the spills. B) Totest for alkalinity, blue litmus paper turns red in the presence of an alkaline. C) To test foracidity, blue litmus paper turns red in the presence of an acid. D) To test forwater, blue litmus paper dissolves immediately upon contact with water. Show Answer Correct Answer: C) To test foracidity, blue litmus paper turns red in the presence of an acid. 45. ..... is the branch of chemistry that would identify enzymes and determine reaction mechanisms for biochemical reactions. Pick the ONE that best represents this A) Organic Chemistry. B) Analytical Chemistry. C) Biochemistry. D) Physical Chemistry. Show Answer Correct Answer: C) Biochemistry. 46. ..... are organic compounds that are good sources of energy. They contain carbon, hydrogen, and oxygen in a 1:2:1 ratio A) Nucleic acids. B) Carbohydrates. C) Proteins. D) Lipids. Show Answer Correct Answer: B) Carbohydrates. 47. What causes water to have a high specific heat? A) Polar Covalent Bonds. B) Nonpolar Covalent Bonds. C) Hydrogen Bonding. D) Ionic Bonds. Show Answer Correct Answer: C) Hydrogen Bonding. 48. The type of chemistry involved in finding out how much nitrogen is in a sample of air. A) Physical. B) Inorganic. C) Organic. D) Analytical. Show Answer Correct Answer: D) Analytical. 49. To form a solution by mixing evenly A) Substance. B) Concentration. C) Dissolve. D) Solubility. Show Answer Correct Answer: C) Dissolve. 50. These elements are dull, brittle, and poor conductors. A) Metals. B) Nonmetals. C) Metalloids. D) Transformers. Show Answer Correct Answer: B) Nonmetals. 51. What two particles determine the mass number? A) Protons and electrons. B) Electrons and neutrons. C) Protons and neutrons. D) None of above. Show Answer Correct Answer: C) Protons and neutrons. 52. The horizontal rows on the periodic table are known as A) Valence electrons. B) Atoms. C) Periods. D) Groups or families. Show Answer Correct Answer: C) Periods. 53. What is the formula of Sodium sulphate A) NaSO2. B) Na2SO3. C) Na2SO4. D) None of the above. Show Answer Correct Answer: C) Na2SO4. 54. What is the percentage by mass of oxygen in a formula unit of sodium hydrogen carbonate (NaHCO3)? A) 57.14%. B) 38.09%. C) 19.05%. D) 28.57%. Show Answer Correct Answer: A) 57.14%. 55. What are the uses of silicone-butadiene rubber? A) Stapler. B) Rubber bands. C) Book. D) None of above. Show Answer Correct Answer: B) Rubber bands. 56. The building blocks of ..... are fatty acids, which contain a carboxyl group and a hydrocarbon chain. A) Carbohydrates. B) Lipids. C) Nucleic acids. D) Proteins. Show Answer Correct Answer: B) Lipids. 57. A milk shake is a(n) A) Mixture. B) Compound. C) Element. D) None of above. Show Answer Correct Answer: A) Mixture. 58. Acetylene is burned in welding torches according to the following chemical reaction:2 C2H2 + 5 O2 $\rightarrow$ 4 C02 + 2 H2OHow many oxygen (O) molecules are involved in the reaction? A) 10. B) 4. C) 5. D) 2. Show Answer Correct Answer: C) 5. 59. Calculate the molecular mass of $ H_2O$ . ( Atomic mass of $ H=1$, $ O=16$ ) A) 17. B) 18. C) 14. D) None of above. Show Answer Correct Answer: B) 18. 60. A ..... is like a recipe for a chemical substance. A) Chemical equation. B) Chemical symbol. C) Chemical formula. D) None of above. Show Answer Correct Answer: C) Chemical formula. ← PreviousNext →Related QuizzesChemistry QuizzesScience QuizzesChemistry Quiz 1Chemistry Quiz 3Chemistry Quiz 4Chemistry Quiz 5Chemistry Quiz 6Chemistry Quiz 7Chemistry Quiz 8Chemistry Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books