This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry – Quiz 14 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 14 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The mass of 0.029 m3 of gold is about 546kg, and the density is 19300kg/m3. It is a soft metal and is usually alloyed to give it more strength. It is a good conductor of heat and electricity, and it has high melting point (1062 $^ \circ$C ) and boiling point (2000 $^ \circ$C).Which of the following is an extensive property of gold? A) Mass. B) Density. C) Boiling point. D) Melting. Show Answer Correct Answer: A) Mass. 2. Several drops of nitric acid are added to a test tube that is filled with potassium chloride solution. What is the most suitable pH value for the mixture? A) 2.0. B) 5.5. C) 7.0. D) 9.8. Show Answer Correct Answer: A) 2.0. 3. A displacement reaction will occur when ..... A) A more reactive metal displaces a less reactive metal from its compound. B) A less reactive metal displaces a more reactive metal from its compound. C) Displacement only occurs when two of the same metals are reacted. D) Displacement reactions will only occur in metals above iron in the reactivity series. Show Answer Correct Answer: A) A more reactive metal displaces a less reactive metal from its compound. 4. Bohr's Planetary Model represented what? A) Electrons spin around the nucleus in a fixed orbital. B) Protons spin around the nucleus in fixed orbitals. C) An atom is a round sphere shaped like a planet. D) Every atom is a little planet. Show Answer Correct Answer: A) Electrons spin around the nucleus in a fixed orbital. 5. When you change from gas to liquid it is called.. A) Freezing. B) Melting. C) Evaporation. D) Condensation. Show Answer Correct Answer: D) Condensation. 6. The method and instrument used to measure the $ Melting\ & amp;\ Boiling\ point$ of a substance is studied under ..... A) Industrial Chemistry. B) Biochemistry. C) Environmental Chemistry. D) Analytical Chemistry. Show Answer Correct Answer: D) Analytical Chemistry. 7. What takes place when a solid changes to a liquid? A) Condensation. B) Freezing. C) Melting. D) Evaporation. Show Answer Correct Answer: C) Melting. 8. An oil company scientist tries to design a better gasoline A) Organic chemistry. B) Analytical chemistry. C) Biochemistry. D) Theoretical chemistry. Show Answer Correct Answer: A) Organic chemistry. 9. The number in front of a chemical formula that tells how many molecules or atoms of each reactant takes part in a reaction is called a: A) Symbol. B) Subscript. C) Coefficient. D) Concentration. Show Answer Correct Answer: C) Coefficient. 10. What is the name of the compound NiSO4? A) Nickel (II) sulfate. B) Nickel (II) sulfite. C) Nickel (II) sulfide. D) Nickel (II) sulfuroxide. Show Answer Correct Answer: A) Nickel (II) sulfate. 11. Hydrogen peroxide is a(n) A) Mixture. B) Compound. C) Element. D) None of above. Show Answer Correct Answer: B) Compound. 12. The atomic mass of an element is equal to A) The number of protons and electrons. B) The number of protons and neutrons. C) The number of electrons and neutrons. D) None of above. Show Answer Correct Answer: B) The number of protons and neutrons. 13. A type of mixture in which the composition of the mixture is not uniform. A) Intensive Mixture. B) Homogeneous Mixture. C) Extensive Mixture. D) Heterogeneous Mixture. Show Answer Correct Answer: D) Heterogeneous Mixture. 14. Which of the following is a sign that a chemical reaction has occurred? A) Change in shape. B) Melting. C) Formation of a gas. D) Dissolving. Show Answer Correct Answer: C) Formation of a gas. 15. A sample of a substance has a mass of 7.3 g and a volume of 2.8 cm3. What is the objects density? A) 2.61 g/cm3. B) 10.1 g/cm3. C) 0.38 g/cm3. D) 20.44 g/cm3. Show Answer Correct Answer: A) 2.61 g/cm3. 16. Name the elements present in Ammonia A) Nitrogen. B) Hydrogen. C) Both nitrogen and hydrogen. D) None of above. Show Answer Correct Answer: C) Both nitrogen and hydrogen. 17. What is the functionof water in the following equation? NaOH + HCl $\rightarrow$ NaCl + H2O A) It is a product. B) It is a reactant. C) It is a reaction. D) It is an element. Show Answer Correct Answer: A) It is a product. 18. When a gas is compressed, what happens to its volume? A) The volume of the gas does not change. B) The volume of the gas increases. C) The volume of the gas decreases. D) The volume of the gas increases and then decreases. Show Answer Correct Answer: C) The volume of the gas decreases. 19. James believes that volume is an intensive property. Which of the following is true? A) James is correct because an intensive property does not depend on the size or amount of material in the sample. B) James is correct because an extensive property depends on the size and amount of material in the sample. C) James is incorrect because an intensive property does not depend on the size or amount of material in the sample. D) James is incorrect because an extensive property does not depend on the size or amount of material in the sample. Show Answer Correct Answer: B) James is correct because an extensive property depends on the size and amount of material in the sample. 20. Mixtures differ from substances because the composition of a mixture can ..... A) Vary. B) Change. C) Combine. D) None of above. Show Answer Correct Answer: A) Vary. ← 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