ABBREVIATIONS. Sample Multiple Choice Problems. Page 1 of 6

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1 Some Tips for the Multiple Choice Section Memorize the definitions all of them Memorize examples of the definitions Be able to know and apply theory Do not look for patterns. If there is a run of Answer Choice C, it s usually a coincidence. I try to go back and make sure that you don t get for example four or five answer choice C in a row, but I m not always successful. Familiarize yourself with all trends Familiarize yourselves with any diagrams that I have written in class You will be asked to do simple math without a calculator: I expect you to be able to multiply and divide by 2, 3, 4, 5, 6, and 10 without the help of a calculator. You will have to do simple addition and subtraction without a calculator. Study everything. I guarantee you: none of these specific questions are on the Final Exam. However, most of the answer choices or the way to solve them show up in some way, shape, fashion, or form either in the main question or as answers. (And, this is a brief review: there are other definitions that aren t on this review sheet that show up on the Final, as well.) ABBREVIATIONS WOTF = Which Of The Following AOTA = All Of The Above NOTA = None Of The Above CBD = Cannot Be Determined Sample Multiple Choice Problems 1) WOTF is an example of an extensive property? A) density D) AOTA B) mass E) NOTA C) molar mass 2) A molecule that has an AXE notation of AX3E is A) bent. D) trigonal planar. B) linear. E) trigonal pyramidal. C) tetrahedral. Page 1 of 6

2 3) WOTF statements is true about cadmium-113. (The atomic symbol for cadmium is Cd) A) #e = 113 D) A = 113 B) #n o = 113 E) Z = 113 C) #p + = 113 4) WOTF is not an example of a physical property? A) Dissolving a piece of sugar in a glass of water. B) Ductility C) Rusting D) Sublimation E) Vaporization 5) WOTF statements about Dalton s Atomic Theory was disproven by the discovery of isotopes. A) All atoms of an element are identical and have the same properties. B) Atoms of different elements combine to form compounds. C) Compounds contain atoms in small whole number ratios. D) Atoms can combine in more than one ratio to form different compounds.. E) NOTA statements about Dalton s Atomic Theory were disproven by the discovery of isotopes. 6) WOTF elements is not monatomic? A) barium B) bromine C) hydrogen D) nitrogen E) oxygen 7) WOTF elements is the most electronegative? (You will have to use periodic trends) A) chlorine B) iodine C) iron D) magnesium E) zinc 8) WOTF types of radiation has the longest wavelength? A) blue light B) IR C) radio waves D) UV E) X-rays 9) WOTF calculations does requires that you to use Avogadro s number A) Calculate the mass of iron from moles of iron. B) Calculate the moles of calcium chloride when given the molarity and volume of a CaCl2 solution. C) Calculate the moles of carbon dioxide when given the number of molecules of carbon dioxide D) Calculate the moles of hydrogen gas when given its P, V, and T. Assume R is given. E) NOTA calculations will require you to use Avogadro s number. 10) WOTF elements has the highest ionization energy? A) calcium B) cesium C) chlorine D) chromium E) copper Page 2 of 6

3 11) WOTF statements is false when poh = 4.00? A) [H3O + ] = M H3O + B) [OH ] = 4.00 C) ph = D) The solution is slightly basic E) NOTA because all of the answers choices are true. 12) WOTF is not a strong acid? A) acetic acid D) perchloric acid B) hydrochloric acid E) sulfuric acid C) nitric acid 13) Name Mg(OH)2 A) magnesium dihydroxide B) magnesium dioxide dihydride C) magnesium hydroxide D) manganese(ii) dihydroxide E) manganese(ii) dioxide dihydride 14) During a lab, a student needs to calculate the mass of salt crystals. He is given the following data: Mass of salt crystals + evaporating dish: g Mass of evaporating dish: g WOTF values is correct, assuming the student wrote his answers in scientific notation: A) g B) g C) g D) g E) g 15) What is the charge of sulfur when it becomes an ion? A) 6 B) 4 C) 2 D) +2 E) CBD Page 3 of 6

4 Refer to the diagram below for Questions 16 and 17 16) WOTF terms describes the arrow in the diagram above? A) an electron D) ground state B) atomic spectra E) relaxation C) excitation 17) WOTF models of the atom best describes the atom in the diagram above? A) Bohr Model of the Atom B) Dalton s Atomic Theory C) Nuclear Model of the Atom D) Plum Pudding Model of the Atom E) Quantum Model of the Atom 18) A gas at 20.0 C occupies a volume of L at a pressure of atm. WOTF is the correct set up to calculate the moles of gas under these conditions. A) n = ( ) ( (20.0 C) L atm ) B) n = ( ) ( (293 K) L atm ) (20.0 C) L atm C) n = ( ) ( ) (293 K) L atm D) n = ( ) ( ) E) NOTA 19) UNKNOWN I has an empirical formula of MX. The empirical mass is g/mol. The molecular mass of UNKNOWN I is g/mol. What is the molecular formula for UNKNOWN I? A) M0.25X0.25 B) MX C) MX4 D) M4X4 E) M21X84 Page 4 of 6

5 Diagram 20: Buret Reading 0 ml 1 ml 2 ml 20) Including uncertainty, WOTF would be an appropriate value to record in the lab notebook? A) 0.3 ml ± 0.1 ml D) 1.6 ml ± 0.1 ml B) 0.35 ml ± 0.01 ml E) 1.65 ml ± 0.05 ml C) 0.35 ml ± 0.05 ml Again, remember These specific questions will not show up word for word on the Final. However Most of the information (necessary to answer the questions in this Practice Multiple Choice Packet) shows up on the Final And, yes, one or two of these questions don t show up on the Final in any way. And, yes, there are multiple choice questions on the Final that do not have analogues in this Packet. In other words: Study all of it and more. The one person who has taken the Final already has said that the Calculations Section was actually easier than the Multiple Choice. Page 5 of 6

6 OK. I lied. Here is the answer key with some limited explanation. Answers 1) B Requires that you know the definition of extensive property. This is one of the few definitions that are exclusively from class notes. I hope you have them. 2) E There was an error on one of the original test review sheets. AX 3E represents trigonal pyramidal not trigonal bipyramidal. You are responsible for the corrected information. 3) D Look up all of the definitions of A, Z, mass number, isotopes, #p + #n o and #e 4) C Look up all of the definitions, including the definition of physical property 5) A Read Dalton s Atomic Theory on p Be able to tell which models of the atom disprove each of the tenets of Dalton s Atomic Theory. 6) A 7) A Yup. There were three A in a row. This was just a coincidence. Don t think that you ve done something wrong. I will try to avoid more than three of the same answer choices on the Exam. 8) C 9) C Answer choice C is the only answer choice in which a representative particle is the starting point or ending destination. 10) C (Another coincidence of three of the same answer choices in a row). 11) B [OH ] = 10 poh = 10^( poh) = = when you plug it correctly into your calculator. 12) A Memorize the names and chemical formulas of the four common strong acids. 13) C Naming! 14) A Actually, I will explain this one. When you do the subtraction, you get: g. Leading zeros are never significant. Therefore, there is only one significant digit in the answer. The answer is A. 15) C 16) C 17) A I know there are a lot of A s and C s. This is just coincidence. 18) B If you understand units and you know the initial equation and rearranging equations with variables this should be no problem. 19) D Go the Appendix I gave you on Empirical and Molecular Formulas. It should already be on the website. 20) C I ll answer this one as well: For burets, you read to the nearest ±0.05 ml because the. lines are very close to each other. Also, burets are read from top to bottom. The correct answer is C Page 6 of 6