This quiz works best with JavaScript enabled. Home > General Knowledge > Science > Chemistry > Chemistry – Quiz 16 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Chemistry Quiz 16 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Valence electrons are found A) Throughout the electron cloud. B) In the energy level closest to the nucleus. C) In the outermost energy level. D) In the nucleus. Show Answer Correct Answer: C) In the outermost energy level. 2. Natural rubber is a polymer derived from? A) Ethylene. B) Isoprene. C) Propylene. D) Butadiene. Show Answer Correct Answer: B) Isoprene. 3. Uranium-235 has 92 protons. How may neutrons do it have? A) 90. B) 143. C) 235. D) 92. Show Answer Correct Answer: D) 92. 4. Fats, oils, and cholesterol are all types of A) Cell membranes. B) Hormones. C) Fatty acids. D) Lipids. Show Answer Correct Answer: D) Lipids. 5. What is Calcium sulphate? A) Potash alum. B) Blue vitriol. C) Gypsum salt. D) Epsom salt. Show Answer Correct Answer: C) Gypsum salt. 6. All atoms of the same element have the same A) Mass number. B) Number of neutrons. C) Atomic number. D) Atomic mass. Show Answer Correct Answer: C) Atomic number. 7. The method that cannot be used for removing permanent hardness of water is A) Adding caustic soda. B) Distillation. C) Adding sodium carbonate. D) Boiling. Show Answer Correct Answer: D) Boiling. 8. A solution with very little solvent A) Saturated. B) Supersaturated. C) Concentrate. D) Unsaturated. Show Answer Correct Answer: C) Concentrate. 9. The symbol for Sodium A) Sm. B) So. C) S. D) Na. Show Answer Correct Answer: D) Na. 10. When disaccharides are changed to monosaccharides, the common chemical process involved is A) Dehydration. B) Hydration. C) Hydrolysis. D) Condensation. Show Answer Correct Answer: C) Hydrolysis. 11. What is a metalloid? A) Anything that is made of metal. B) An element that has properties of a nonmetal. C) A band that plays rock music. D) An element that has some properties of a metal and some properties of a nonmetal. Show Answer Correct Answer: D) An element that has some properties of a metal and some properties of a nonmetal. 12. What among following is used to produce artificial rain? A) Carbon monoxide. B) Silver iodide. C) Silver nitrate. D) Copper oxide. Show Answer Correct Answer: B) Silver iodide. 13. What atom matches this electron configuration? [Xe] 6s25d9 A) Mercury. B) Gold. C) Platinum. D) Thallium. Show Answer Correct Answer: B) Gold. 14. Which biomolecule has sugars and starches? A) Carbohydrates. B) Lipids. C) Nucleic Acid. D) Proteins. Show Answer Correct Answer: A) Carbohydrates. 15. The breakdown of water into hydrogen and oxygen is A) Electrolysis. B) Composition. C) State of matter. D) None of above. Show Answer Correct Answer: A) Electrolysis. 16. What is the group and period of the element sodium? A) Group 1 Period 1. B) Group 4 Period 3. C) Group 1 Period 3. D) Group 7 Period 1. Show Answer Correct Answer: C) Group 1 Period 3. 17. An ionic bond is formed by A) Two or more positive ions combining. B) Two or more negative ions combining. C) A positive and a negative ion attracting each other. D) Sharing of a pair of electrons. Show Answer Correct Answer: C) A positive and a negative ion attracting each other. 18. Creature with only one cell A) Cell. B) Multicellular. C) Organism. D) Unicellular. Show Answer Correct Answer: D) Unicellular. 19. Taking Avogadro's number as 6.0 x 1023, what is the number of particles in 9 grams of H2O? A) $ 1.8\ X\ 10\uparrow24$. B) $ 0.5\ X\ 10\uparrow23$. C) $ 9\ x\ 10\ \uparrow23$. D) $ 3\ X10\uparrow23$. Show Answer Correct Answer: D) $ 3\ X10\uparrow23$. 20. In any chemical reaction, the quantities that are preserved are the ..... A) Number of moles and the volumes. B) Number of molecules and the volumes. C) Mass and the number of atoms. D) Mass and moles. Show Answer Correct Answer: C) Mass and the number of atoms. 21. Which element is present in all life forms? A) Adenosine triphosphate (ATP). B) Molecule. C) Carbon. D) Compound. Show Answer Correct Answer: C) Carbon. 22. Capillary action involves A) Cohesion and adhesion. B) Surface tension. C) Nonpolar covalent bonding. D) Ionic bonding. Show Answer Correct Answer: A) Cohesion and adhesion. 23. What biologist call the large moelcules that make up the "big 4" A) Polysaccharide. B) Monosaccharide. C) Macromoleucles. D) Monomer. Show Answer Correct Answer: C) Macromoleucles. 24. The monomer of polythene is A) Ethylene. B) Ethyl alcohol. C) Vinyl chloride. D) None of the above. Show Answer Correct Answer: A) Ethylene. 25. Avogadro's number is A) The volume of any gas in liters at RTP. B) The number of particles in one mole of a substance. C) The volume of any gas in liters at STP. D) The number of grams in one mole of a substance. Show Answer Correct Answer: B) The number of particles in one mole of a substance. 26. A physical change where the substance undergoes changes without changing its chemical composition A) Physical properties. B) Chemical properties. C) Phase transition. D) Matter. Show Answer Correct Answer: C) Phase transition. 27. Which element is located on the Periodic Table with other metals, but is a gas at room temperature A) H. B) O. C) He. D) Hg. Show Answer Correct Answer: A) H. 28. Increasing numbers on the periodic table indicate ..... A) Periodic. B) Electron rings. C) Valence electrons. D) Group. Show Answer Correct Answer: A) Periodic. 29. In a graduated cylinder containing several liquid layers, the least dense liquid is found A) Floating on the top. B) In the middle layer. C) Settled on the bottom. D) None of above. Show Answer Correct Answer: A) Floating on the top. 30. To change from moles of a given substance, to moles of the substance sought, one uses the ..... A) Ratio of the molar masses of the two substances. B) Balanced equation coefficients for the substances. C) Subscripts in the formulas for the substances. D) All the above. Show Answer Correct Answer: B) Balanced equation coefficients for the substances. 31. The nuclear particles which are assumed to hold the nucleons together are? A) Mesons. B) Positrons. C) Electrons. D) Neutrons. Show Answer Correct Answer: A) Mesons. 32. Area or sphere is referred as ..... A) Composition. B) Consumer Products. C) Science. D) Field. Show Answer Correct Answer: C) Science. 33. If an atom is located in the 1st column of the periodic table, then a neutral atom has A) 1 energy level. B) 1 valence electrons. C) A difference between protons and neutrons of 1. D) To gain one electron. Show Answer Correct Answer: B) 1 valence electrons. 34. Which compound has the most atoms? A) H2O. B) O2. C) NaCl. D) C3H6O3. Show Answer Correct Answer: D) C3H6O3. 35. Sugars are converted in the liver into A) Vitamin. B) Glycogen. C) Monosaccharide. D) None of above. Show Answer Correct Answer: B) Glycogen. 36. A ..... is the smallest chemical unit of matter. When these units all have the same number of protons, they are the same ..... A) Atom, atom. B) Element, atom. C) Atom, element. D) Element, element. Show Answer Correct Answer: C) Atom, element. 37. What is the number of signifiant digits present in0.01025 A) 3. B) 2. C) 4. D) 5. Show Answer Correct Answer: C) 4. 38. A H2O molecule is bonded by what kind of bond? A) Electronic. B) Covalent. C) Hydrogen. D) Ionic. Show Answer Correct Answer: B) Covalent. 39. What determines the order of placement of the elements on the modern Periodic Tables? A) Atomic number. B) The number of neutrons, only. C) Electron number. D) Atomic mass. Show Answer Correct Answer: A) Atomic number. 40. A chemical symbol always begins with a A) Number. B) Capital letter. C) Cursive letter. D) Lower case letter. Show Answer Correct Answer: B) Capital letter. 41. What is a biological molecule? A) Organic molecule found in any organism. B) Any nonliving thing. C) The building block of life. D) Any living thing. Show Answer Correct Answer: A) Organic molecule found in any organism. 42. Represents all the known elements ..... A) Periodic table. B) Lewis Dot structures. C) Bohr diagrams. D) Atomic theory. Show Answer Correct Answer: A) Periodic table. 43. Which of these is a mixture? A) Fluorine (Fl). B) Salt (NaCl). C) Oxygen (O). D) Laundry Detergent. Show Answer Correct Answer: D) Laundry Detergent. 44. At what pH level would both Bromthymol blue and Bromcresol green be yellow? A) 5. B) 10. C) 3. D) 6. Show Answer Correct Answer: C) 3. 45. A solution that contains the maximum amount of solute that a given quantity of a solvent can dissolve A) Unsaturated solution. B) Solution. C) Supersaturated solution. D) Saturated solution. Show Answer Correct Answer: D) Saturated solution. 46. A homogeneous mixture is a A) Compound. B) Solution. C) Plasma. D) Element. Show Answer Correct Answer: B) Solution. 47. Subatomic particles with a negative charge A) Protons. B) Electrons. C) Neutrons. D) Quarks. Show Answer Correct Answer: B) Electrons. 48. A substance will have stronger London dispersion forces if it has A) Fewer electrons. B) Polar bonds. C) More electrons. D) Hydrogen bonded oxygen. Show Answer Correct Answer: C) More electrons. 49. What does an enzyme do? A) Adds activation energy to a reaction. B) Lowers the amount of activation energy needed for a reaction. C) Raises the amount of activation energy for the reaction. D) Does not affect the metabolism of living things. Show Answer Correct Answer: B) Lowers the amount of activation energy needed for a reaction. 50. RNA stands for what? A) Reoxyribonucleic acid. B) Risosome nucleic acid. C) Ribonucleic acid. D) Deoxyribonucleic acid. Show Answer Correct Answer: C) Ribonucleic acid. 51. What is the mass of one mole of potassium (K)? A) 30.97 grams. B) 38 grams. C) 39.10 grams. D) 19 grams. Show Answer Correct Answer: C) 39.10 grams. 52. Which of the following would be considered a combustion reaction? A) CH4 + Li. B) O2 + Li. C) C3H8 + O2. D) None of the following. Show Answer Correct Answer: C) C3H8 + O2. 53. It is anything that has mass and takes up space A) Chemistry. B) Electrons. C) Matter. D) Atoms. Show Answer Correct Answer: C) Matter. 54. The ejection of electrons when a metal surface is irradiated is known as A) Photoelectric effect. B) Zeeman effect. C) Atomic spectrum. D) Black body radiation. Show Answer Correct Answer: A) Photoelectric effect. 55. A sample of Strontium 88 has a atomic number of 38 and an ion charge of +2. How many protons are in an atom of Strontium 88? A) 88. B) 38. C) 40. D) 90. Show Answer Correct Answer: B) 38. 56. A small quantity of salt is stirred into a liter of water until it dissolves. In the resulting mixture, the salt is A) The filtrate. B) The solute. C) The precipitate. D) The solvent. Show Answer Correct Answer: B) The solute. 57. Brain Teaser:A magnesium atom has an atomic number of 12, an atomic mass of 25, and a +2 charge. This atom would contain ..... protons, ..... neutrons, and ..... electrons. A) 12; 25; 2. B) 12; 13; 14. C) 12; 13; 10. D) None of above. Show Answer Correct Answer: C) 12; 13; 10. 58. Atomic number is equal to A) Number of nutron. B) Number of protons. C) Number of electrons. D) Total number of protons and neutrons. Show Answer Correct Answer: B) Number of protons. 59. Mary wants to get the iron filings out of some fine sand, what could be used to separate these two solids? A) Sieve. B) Evaporation. C) Magnet. D) Decantation. Show Answer Correct Answer: C) Magnet. 60. How many dots does the electron-dot diagram of nitrogen have? A) 5. B) 3. C) 7. D) 15. Show Answer Correct Answer: A) 5. ← PreviousNext →Related QuizzesScience QuizzesGeneral Knowledge 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