This quiz works best with JavaScript enabled. Home > Science > Chemistry > Chemistry Basics > Chemistry – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 15 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Hydrogen peroxide is a(n) A) Mixture. B) Compound. C) Element. D) None of above. Show Answer Correct Answer: B) Compound. 2. 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. 3. 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. 4. 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. 5. 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. 6. 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. 7. 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. 8. 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. 9. 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. 10. 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. 11. What two molecules are located inside of the nucleus of an atom? A) Electrons and Neutrons. B) Protons and Electrons. C) Protons and Neutrons. D) None of above. Show Answer Correct Answer: C) Protons and Neutrons. 12. Unit cell of a crystal is defined by its ..... A) Dimension. B) Lattice points. C) End points. D) None of above. Show Answer Correct Answer: B) Lattice points. 13. Which of the following is not a compound? A) HCl. B) Cl. C) NaCl. D) CO2. Show Answer Correct Answer: B) Cl. 14. ..... discovered carbon. A) Al razi. B) J. Black. C) J. Priestly. D) Ibn e sina. Show Answer Correct Answer: B) J. Black. 15. Almost every situation you can imagine involves a chemist, because ..... A) Chemists are nosy. B) Everything is made of matter. C) Chemists are well-paid. D) Ozone depletion is a problem. Show Answer Correct Answer: B) Everything is made of matter. 16. Cm3 of 1.0 mol dm-3 hydrochloric acid is neutralized by 25cm3 of barium hydroxide solution. What is the molarity of barium hydroxide? A) 0.625 mol dm-3. B) 1.600 mol dm-3. C) 0.800 mol dm-3. D) 3.500 mol dm-3. Show Answer Correct Answer: C) 0.800 mol dm-3. 17. The ability of an atom to attract electrons when the atom is in a compound. A) First ionization energy. B) Electronegativity. C) Atomic radii. D) All of the above. Show Answer Correct Answer: B) Electronegativity. 18. In a covalent bond, electrons are A) Gained. B) Pulled apart. C) Shared. D) In the nucleus. Show Answer Correct Answer: C) Shared. 19. Which of the following is true about ammonia solution in methylbenzene? A) Has pH value more than 7. B) No change on red litmus paper. C) Ionises partially to produce hydroxide ions. D) Ammonium ions and hydroxide ions move freely in the solution. Show Answer Correct Answer: B) No change on red litmus paper. 20. How would you describe the way molecules move when the molecules are solid? A) The molecules are moving in place. B) The molecules are moving around each other. C) The molecules are moving away from each other. D) The molecules are not moving. Show Answer Correct Answer: A) The molecules are moving in place. ← PreviousNext →Related QuizzesChemistry QuizzesScience QuizzesChemistry Quiz 1Chemistry Quiz 2Chemistry Quiz 3Chemistry Quiz 4Chemistry Quiz 5Chemistry Quiz 6Chemistry Quiz 7Chemistry Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books