This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 21 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 21 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The mass of $ one\ MOLE$ of a substance is called ..... A) Atomic mass. B) Formula mass. C) Molar mass. D) Molecular mass. Show Answer Correct Answer: C) Molar mass. 2. The Maillard reaction usually requires ..... in the cooking process. A) Ice. B) Cold weather. C) Heat. D) Hot weather. Show Answer Correct Answer: C) Heat. 3. What's the difference between a prokaryotic cells and euykarotic cells? A) Only prokaryotic cells have cytoplasm. B) Only eukaryotic cells have a cell membrane. C) Only prokaryotic cells have genetic material. D) Only eukaryotic cells have membrane-bound organelles. Show Answer Correct Answer: D) Only eukaryotic cells have membrane-bound organelles. 4. Which branch of chemistry would look at the efficiency of a medication based on its reactions within a human body? A) Organic. B) Inorganic. C) Biochemistry. D) Physical. Show Answer Correct Answer: C) Biochemistry. 5. How do gates at an event function in a similar way to the cell membranes? A) Gates charge you to get in. B) Gates keep everything out. C) Gates control how people enter and exit. D) All of the above. Show Answer Correct Answer: C) Gates control how people enter and exit. 6. Matter with a definite shape and volume A) Solid. B) Liquid. C) Gas. D) Plasma. Show Answer Correct Answer: A) Solid. 7. An element is made of ..... A) Atoms that are all the same. B) Different types of atoms. C) Air. D) Liquids and solids. Show Answer Correct Answer: A) Atoms that are all the same. 8. Gallons = ..... hL A) 0.19. B) 0.20. C) 20. D) 1900. Show Answer Correct Answer: B) 0.20. 9. Which of the following are NOT signs that a chemical reaction occured? A) The properties changed. B) Bubbles of gas formed. C) Color stays the same. D) Smells different. Show Answer Correct Answer: C) Color stays the same. 10. The chemical bond formed when two atoms share electrons is called a(n) A) Ionic bond. B) Orbital bond. C) Lewis structure. D) Covalent bond. Show Answer Correct Answer: D) Covalent bond. 11. What is the simplest form that cannot be broken down to anything simpler? A) Element. B) Solution. C) Compound. D) None of above. Show Answer Correct Answer: A) Element. 12. Water (H2O) and table salt (NaCl) can be combined to form salt water. How can this combination be classified? A) As a compound because the water (H2O) and table salt (NaCl) are chemically combined. B) As a compound because the water (H2O) and table salt (NaCl) form a new pure substance. C) As a mixture because the water (H2O) can be evaporated and physically separated from the table salt (NaCl). D) As a mixture because the water (H2O) is nonpolar and can be chemically separated from the table salt (NaCl). Show Answer Correct Answer: C) As a mixture because the water (H2O) can be evaporated and physically separated from the table salt (NaCl). 13. When iron and oxygen combine to form iron oxide, A) A physical change occurs. B) A change of state occurs. C) A change in mass occurs. D) A chemical change occurs. Show Answer Correct Answer: D) A chemical change occurs. 14. Starting substance in a chemical reaction A) Reactant. B) Product. C) Energy. D) Elements. Show Answer Correct Answer: A) Reactant. 15. Are made from a combination of 2 or more elements ..... A) Molecules. B) Pure Substances. C) Compounds. D) Elements. Show Answer Correct Answer: C) Compounds. 16. Which type of element is shiny, ductile and malleable? A) Metal. B) Nonmetal. C) Metalloid. D) Play dough. Show Answer Correct Answer: A) Metal. 17. Which of the following are sources of biomass to replace natural gas as the feedstock of many industrial processes? (1) Seaweed from large-scale farming (2) Waste paper from schools and offices (3) Methane gas from landfill sites A) And (2) only. B) And (3) only. C) And (3) only. D) , (2) and (3). Show Answer Correct Answer: D) , (2) and (3). 18. Mol dm-3 aqueous solution of acid W has a pH of 4.5. Which of the following statements is true for acid W? A) Acid W has a high degree of dissociation in water. B) Acid W has a high melting point. C) Aqueous solution of acid W has a low concentration ofhydrogen ions. D) Acid W is a diprotic acid. Show Answer Correct Answer: C) Aqueous solution of acid W has a low concentration ofhydrogen ions. 19. What is made up two or more elements that are chemically combined? A) Element. B) Mixture. C) Compound. D) Solids. Show Answer Correct Answer: C) Compound. 20. The mass exactly equal to $ \frac{1}{12}th$ the mass of $ C-12$ atom is called ..... A) Weight. B) Atomic mass. C) Relative atomic mass. D) None of above. Show Answer Correct Answer: C) Relative atomic mass. ← 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