This quiz works best with JavaScript enabled. Home > General Knowledge > Science > Chemistry > Chemistry Basics > Chemistry – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 8 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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. 2. 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). 3. When iron and oxygen combine to form iron oxide, A) A change of state occurs. B) A change in mass occurs. C) A physical change occurs. D) A chemical change occurs. Show Answer Correct Answer: D) A chemical change occurs. 4. Starting substance in a chemical reaction A) Energy. B) Product. C) Elements. D) Reactant. Show Answer Correct Answer: D) Reactant. 5. Are made from a combination of 2 or more elements ..... A) Elements. B) Molecules. C) Pure Substances. D) Compounds. Show Answer Correct Answer: D) Compounds. 6. Which type of element is shiny, ductile and malleable? A) Metal. B) Nonmetal. C) Metalloid. D) Play dough. Show Answer Correct Answer: A) Metal. 7. 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). 8. 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 is a diprotic acid. B) Acid W has a high degree of dissociation in water. C) Acid W has a high melting point. D) Aqueous solution of acid W has a low concentration ofhydrogen ions. Show Answer Correct Answer: D) Aqueous solution of acid W has a low concentration ofhydrogen ions. 9. What is made up two or more elements that are chemically combined? A) Mixture. B) Solids. C) Compound. D) Element. Show Answer Correct Answer: C) Compound. 10. 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. 11. Examples of these biomolecules are DNA and RNA ..... A) Proteins. B) Nucleic Acids. C) Carbohydrates. D) Lipids. Show Answer Correct Answer: B) Nucleic Acids. 12. What is the chemical formula of an alkene that has 3 carbon atoms? A) C3H2. B) C3H6. C) C3H4. D) C3H8. Show Answer Correct Answer: B) C3H6. 13. Negatively charged subatomic particles. A) Quarks. B) Neutrons. C) Electrons. D) Protons. Show Answer Correct Answer: C) Electrons. 14. Which scientist is credited with discovering the negatively charge subatomic particles in the atom? A) Neils Bohr. B) Dalton. C) Ernest Rutherford. D) J.J. Thompson. Show Answer Correct Answer: D) J.J. Thompson. 15. Table Sugar (C12H22O11) has how many atoms of hydrogen? A) 12. B) 45. C) 22. D) 11. Show Answer Correct Answer: C) 22. 16. Which of the following is a characteristic of Atomic Packing Factor? A) Fraction of volume in a crystal that is occupied by constituent particles. B) Is dimentionless and always less than unity. C) Determined by assuming that atoms are rigid spheres. D) Everything in the list. Show Answer Correct Answer: D) Everything in the list. 17. Which of the following properties is a physical property? A) Corrosive. B) Boiling point. C) Flammability. D) Reacts with metals. Show Answer Correct Answer: B) Boiling point. 18. Is NaCl an element or compound? A) Element. B) Compound. C) Both. D) None of above. Show Answer Correct Answer: B) Compound. 19. A Mixture is defined as A) A combination of two or more substances that are not chemically combined. B) A combination of compounds that are chemically bonded. C) 2 or more elements chemically bonded. D) None of above. Show Answer Correct Answer: A) A combination of two or more substances that are not chemically combined. 20. How many significant figures are present in 0.0025 A) Five. B) Two. C) Three. D) Four. Show Answer Correct Answer: B) Two. 21. Which of the following would you use to separate mixtures based on their rate of passing through a medium with a solvent present? A) Distillation. B) Chromatography. C) Filtration. D) None of above. Show Answer Correct Answer: B) Chromatography. 22. The state of matter that has no definite size or shape is A) Solid. B) Liquid. C) Gas. D) None of above. Show Answer Correct Answer: C) Gas. 23. Sulphur shows valencies A) 2. B) 4. C) Both. D) None of above. Show Answer Correct Answer: C) Both. 24. Mass percent of phosphorus in calcium phosphate is A) 41.29%. B) 38.71%. C) 20%. D) 28%. Show Answer Correct Answer: C) 20%. 25. Which determines the mass of an element? A) Protons. B) Neutrons. C) Electrons. D) Only Protons and Neutrons. Show Answer Correct Answer: D) Only Protons and Neutrons. 26. Place the following number in scientific notation:0.0000000349600 A) 3.50 x108. B) 3.50 x10-8. C) 3.49 x108. D) 35.0 x10-8. Show Answer Correct Answer: B) 3.50 x10-8. 27. An atom has 29 protons, 29 electrons, and 35 neutrons. What is the mass number of the atom? A) 93. B) 35. C) 64. D) 29. Show Answer Correct Answer: C) 64. 28. Al razi was a great physcian, scientist and chemist. He discovered many things. One of them was A) Nothing. B) Anaesthesia. C) Carbon. D) Water. Show Answer Correct Answer: B) Anaesthesia. 29. Suppose that you experimentally determine the mass of nylon formed as a result of each of several similar chemical processes. What are the measurements of mass called? A) Qualitative data. B) Quantitative data. C) Controls. D) Independent variables. Show Answer Correct Answer: B) Quantitative data. 30. ..... is the branch of chemistry that would study and develop new materials to improve existing products or make new ones that in general do no contain carbon. A) Inorganic Chemistry. B) Physical Chemistry. C) Organic Chemistry. D) Biochemistry. Show Answer Correct Answer: A) Inorganic Chemistry. 31. Sodium fluoride has a high melting and boiling point because ..... A) Hydrogen bond exist in the molcules. B) Weak van der waals forces between molecule. C) Strong van der waals forces between molecules. D) The ions are held by strong electrostatic forces. Show Answer Correct Answer: D) The ions are held by strong electrostatic forces. 32. Phase change from a gas to a liquid. A) Melting. B) Condensation. C) Evaporation. D) Deposition. Show Answer Correct Answer: B) Condensation. 33. Mercury is a metal that is liquid at room temperature and has a density of 13.5 g/cm3. Which of these metals would sink below the mercury if dropped into a container of mercury? A) Aluminum (density=2.7g/cm3). B) Iron (density=7.9g/cm3). C) Lead (density=11.4 g/cm3). D) Gold (density=19.3 g/cm3). Show Answer Correct Answer: D) Gold (density=19.3 g/cm3). 34. The study of the properties and changes in matter and their relation to energy. A) Physical Chemistry. B) Organic Chemistry. C) Biochemistry. D) Inorganic Chemistry. Show Answer Correct Answer: A) Physical Chemistry. 35. Chemistry is the study of the ..... and behaviors of ..... A) Properties, matter. B) Energy, matter. C) Size, mass. D) Characteristics, life. Show Answer Correct Answer: A) Properties, matter. 36. What is the correct formula for Ammonium phosphate? A) NH4(PO4)3. B) NH43PO4. C) NH4PO4. D) (NH4)3PO4. Show Answer Correct Answer: D) (NH4)3PO4. 37. What reaction is used to make soaps? A) Condensation. B) Hydrolysis. C) Esterification. D) None of above. Show Answer Correct Answer: B) Hydrolysis. 38. Which type of reaction occurs when 2-iodo-2-methylpropane, C(CH3)3I, reacts with aqueous sodium hydroxide, NaOH(aq)? A) Free-radical substitution. B) Addition. C) SN2. D) SN1. Show Answer Correct Answer: D) SN1. 39. In ionic bonds, electrons are A) Gained or lost. B) Shared. C) Mixed randomly. D) Negatively charged. Show Answer Correct Answer: A) Gained or lost. 40. Which property is similar for chlorine, bromine, iodine and astatine in Group 17 of the Periodic Table? I Reacts with water to form an acidic solution.II Reacts with sodium hydroxide solution to form two salts.III Exist as solid at room temperature.IV All are good bleaching agents. A) I and II. B) I and III. C) II and IV. D) III and IV. Show Answer Correct Answer: A) I and II. 41. How many atoms of magnesium are present in 96u of Magnesium A) 0.25. B) 25. C) 4. D) 0.4. Show Answer Correct Answer: C) 4. 42. What is the name of the compound P3O5? A) Triphosphorus oxide. B) Phosphorus oxide. C) Triphosphorus pentaoxide. D) Phosphorus pentaoxide. Show Answer Correct Answer: C) Triphosphorus pentaoxide. 43. A group of elements in the periodic table is also called a ..... A) Family. B) Period. C) Element. D) Row. Show Answer Correct Answer: A) Family. 44. G of solid potassium chloride, KCl needs to be dissolved in distilled water to produce 0.4 mol dm-3 potassium chloride solution, KCl. What is the volume of distilled water needed to dissolve the solid potassium chloride? [Molar mass of KCL = 74.5 g mol-1] A) 200 cm3. B) 50 cm3. C) 2 000 cm3. D) 500 cm3. Show Answer Correct Answer: D) 500 cm3. 45. What is a solvent A) The solid that is about to be dissolved. B) Another word for solubility. C) A liquid that will dissolve a solid solute. D) A substance that make drinks change color. Show Answer Correct Answer: C) A liquid that will dissolve a solid solute. 46. ..... are made up of solutes and solvents. A) Solutions. B) Suspension. C) Colloid. D) None of above. Show Answer Correct Answer: A) Solutions. 47. What term describes a liquid changing to a gas? A) Freezing. B) Sublimation. C) Evaporation. D) Deposition. Show Answer Correct Answer: C) Evaporation. 48. In this equation 2NaF + Br2 $\rightarrow$2NaBr +F2The underline part is a ..... A) Product. B) Reactant. C) Element. D) None of above. Show Answer Correct Answer: A) Product. 49. Which of the following substances are structural isomers of each other? I. CH3(CH2)3CH3II. (CH3)2CHCH3III. CH3CH(CH3)CH2CH3 A) I and II only. B) I and III only. C) II and III only. D) I, II and III. Show Answer Correct Answer: B) I and III only. 50. Your bicycle stayed outside during last week'srain. Then you noticed rust forming onsome of the shiny metal parts. What typeof change has occurred? A) Endothermic. B) Chemical. C) Physical. D) Tarnishing. Show Answer Correct Answer: B) Chemical. 51. What is surface tension? A) The outward force that maximizes the surface area of a liquid. B) The outward force that minimizes the surface area of a liquid. C) The inward force that maximizes the surface area of a liquid. D) The inward force that minimizes the surface area of a liquid. Show Answer Correct Answer: D) The inward force that minimizes the surface area of a liquid. 52. Only two sides are equal and all have equal angles (90$^ \circ$) A) Cubic. B) Tetragonal. C) Orthorhombic. D) None of above. Show Answer Correct Answer: B) Tetragonal. 53. Which statements about substitution reactions are correct? I. The reaction between sodium hydroxide and 1-chloropentane predominantly follows an SN2 mechanism.II. The reaction between sodium hydroxide and 2-chloro-2-methylbutane predominantly follows an SN2 mechanism.III. The reaction of sodium hydroxide with 1-chloropentane occurs at a slower rate than with 1-bromopentane. A) I and II only. B) I and III only. C) II and III only. D) I, II and III. Show Answer Correct Answer: B) I and III only. 54. How many atoms is in this formula? NaFBr2 A) 4. B) 7. C) 9. D) 6. Show Answer Correct Answer: A) 4. 55. The branch of chemistry that would study the process of photosynthesis in plants. A) Physical. B) Inorganic. C) Analytical. D) Biochemistry. Show Answer Correct Answer: D) Biochemistry. 56. Substance present at the start of a reaction A) Product. B) Reactant. C) Matter. D) Element. Show Answer Correct Answer: B) Reactant. 57. A chemistry teacher explores the different uses of Nylon in for the production o textiles. What type of research is used? A) Basic research. B) Applied research. C) Technological development. D) None of above. Show Answer Correct Answer: B) Applied research. 58. Measure of the amount of matter an object has. A) Mass. B) Volume. C) Element. D) Compound. Show Answer Correct Answer: A) Mass. 59. What type of bond is $ k_2O$ A) Covalent. B) Ionic. C) Metallic. D) None of above. Show Answer Correct Answer: B) Ionic. 60. Every element has a unique name. Elements can also be represented by- A) Mass. B) Periodic group. C) Its chemical weight. D) Its chemical symbol. Show Answer Correct Answer: D) Its chemical symbol. ← PreviousNext →Related QuizzesChemistry QuizzesScience QuizzesChemistry Quiz 1Chemistry Quiz 2Chemistry Quiz 3Chemistry Quiz 4Chemistry Quiz 5Chemistry Quiz 6Chemistry Quiz 7Chemistry Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books