SE402 June 2012 Exam
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This document is a science exam for secondary 4 students covering topics in chemistry and the environment. It consists of two parts, with part A containing 9 multiple choice questions and part B containing 8 constructed response questions. The questions cover topics such as neutralization reactions, chemical bonding, endothermic and exothermic reactions, environmental pollution, photosynthesis, soil pH, atmospheric circulation, nuclear accidents, and more. Students are instructed to answer all questions in the provided answer booklet and are permitted to use writing tools and an approved scientific calculator.
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SE402 June 2012 Exam
- 1. 1 tcience and the Environment Theory Eamin.aiion p. Question Booblet Our Future Begins Here ‘)4iJ Notre avenr commence id SE Secondary 4 (558-402) June 2012 Secondary 4 I ‘A II
- 2. INSTRUCTIONS • 1. Write the required information on the titte page of the Answer Booklet. 2. This examination consists of two parts. Part A: 9 Muttipte Choice Questions, Part B: 8 Constructed Response Questions. 3. Answer att questions in the Answer Booklet, showing atL your work. 4. You are permitted to use writing instruments, a scientific catcutator without a graphic dispLay and a ruter. To ensure fairness to all students graphing calculators or any other type of calculator that stores information should not be used. Memory aids and etectronic devices such as, cet( phones, MP3 players, cameras, etc. are prohibited. 5. You may refer to the information provided in the Appendices of the Question Booklet. The use of any other reference materiaL is strictLy forbidden. .Note: Figures are not necessarily drawn to scate. Time: 2 hours I Sec 4 Science and the Environment (SE) WQSB, June 2012 Theory Exam, Question Booklet Page 1
- 3. Part A Multiple Choice Questions Questions I to 9 Answer alt the questions in your Answer Booklet. Question I Neutralization reactions are often used in agriculture and manufacturing. Which of the following balanced equations represents a neutralization reaction? A) C3H8+5O2—3CO2+4H20 8) 6 CO2 + 6 H20 + energy — C6H1206 + 6 02 C) 2 NaOH + H2S04 —> Na2 SO4 + 2 H20 D) Pb(N03)2 (aq) + 2 KI(aq) 4 Pb!2 (s) + 2 KNO3 (aq) Question 2 Your friend Mytihn is in CEGEP. She needs your help in reviewing the nature of chemical bonds. Which of the following substances will form covalent bonds? 1. CCl 2. Na2CO3 3. P8r3 4. KCL 5. N2 6. KF A) J,2and3 B) 7,3and5 C) 2,4and6 D) 4,5and6 Sec 4 Science and the Environment (SE) WQSB, June 2012 Theory Exam, Question Booklet Page 2 —
- 4. Question 3 Whether you are working in a Laboratory or in industry, it is important to understand that the position of the energy term in a chemicat equation wilt teLl you whether the reaction wiLt be endothermic or exothermic. Match the terms in the first column with the equations in the second column. ‘ Type of Reaction Equations I. Endothermic reaction 1. 4 Fe ÷ 3 °2(g) —> 2 Fe203(5) + 1648.4 kJ II. Exothermic reaction 2. NaCL(5) + 4.3 k] —* Na(aq) + Ct(aq) 3. CH3CH2OH(1) + 3 O(g) 2 CO2(g) + 3 HOtg + 1367 kJ 4. °2(g) + 104 k] -4 2 NO(g) A) I-i , 1—3, 11-2, 11-4 BiTTh4iI-2-3-Ii3—- C) 1—2, 1—3, Il—i, 11—4 D) Question 4 There are many contaminants which pollute the environment. . . Which of the foLlowing substances would contaminate the atmosphere? A) Sulphur dioxide 8) Sodium hydroxide C) Potassium bromide D) Catcium chLoride Sec 4 Science and the Environment (SE) Theory Exam, Question Bookiet WQSB, June 2012 Page 3
- 5. Question 5 The company “Cteanalt” conducts tests in their Laboratory to determine the toxicity threshotdof their cleaning products. Every 70 minutes, a technician adds a drop of a detergent to an aquarium containing apopulation of Daphnia (small crustaceans). She must determine the toxicity threshotd of thedetergent. Which of the foltowing statements indicates that the toxicity threshotd for thedetergent has been reached? A) The Daphnia are behaving normaLLy, 10 minutes after the detergent has beenadded. B) The mobiLity of a few of the Daphnia is reduced, 20 minutes after the detergenthas been added. C) Half of the Daphnfa are dead, 30 minutes after the detergent has been added. D) All of the Daphnia are dead, 40 minutes after the detergent has been added. Question 6 Plants pLay an essentiat role in the maintenance of life. Photosynthesis and respirationare two vital processes which occur in pLants. Which of the following equations represents photosynthesis? IA) 6 CO2 + sotar energy —* C6H1206 + 6 02 ÷ 6 H20 B) 6 CO2 ÷ 6 H20 ÷ soLar energy — C6H1206 ÷ 6 02 C) C6H1206 ÷ 6 + 6 H20 — 6 CO2 + soLar energy D) C6H1206 + 6 02 — 6 CO2 ÷ 6 H20 + solar energy Sec 4 Science and the Environment (SE) WQSB, June 2012Theory Exam, Question Booklet Page 4
- 6. Question 7 Mario wants to acquire (and to produce vegetabtes. Vegetabtes require soil that is stightty acidic. He visited the four tocations shown below. He then asked an agricutturatist to collect and anaLyze soil samples from each Location. Which of the following diagrams represents the best location for Mario’s requirements? Sec 4 Science and the Environment (SE) Theory Exam, Question Booklet t - 0 o ° 0 a a a 000 0 o U 0a co 0OoO s WQSB, June 2012 Page 5 I A) B) D) 1= 0 0 0 0 o 0 0 a o 0 0 000 0 o U 0 3 0 0 0 0 o 0 0 a o 0 0 000 O 0 o 0 00 0300 S ‘I 0 - o ° 0 a o o 0 0 OOo °° o ;; 0000 . pH: 7.5 pH: 5.5 pH: 7.5 pH: 6.0
- 7. Question 8 Atmospheric circuLation creates the phenomenon of Convection, which is ittustrated in the diagram betow. Warm, humid air from the region around the equator moves towards the poLes. Cotd, dry air from the PoLar Regions descends towards the equator. Which of the foltowing represents the phenomenon of Convection? A) B) C) D) Sec 4 Science and the Environment (SE) Theory Exam, Question Booklet WQSB, June 2012 Page 6 Equator Poles Pressure Temperature Pressure Temperature t 1’ 1’ -t 4’ 4’ 1’ %I 4’ 4’ I1 4’
- 8. Question 9 Hydro-Québec operates one nuctear power plant, the GentitLy-2 generating station. If there were an accident at the Gentilty-2 nuctear power pLant, a radioactive cLoud would be reLeased, having negative consequences on alt living organisms in the surrounding environment. Therefore, it is important to understand how prevailing winds would disperse contaminants in the event of a nuctear meLtdown. . Referring to the map below, determine the indicate which zone woutd be affected. 8) Zone 2 C) Zone 3 D) Zone 4 Dath the radioactive cloud would fottow and . Sec 4 Science and the Environment (SE) Theory Exam, Question Booklet . Map of Québec A) Zone I WQSB, June 2012 Page 7
- 9. Question 10 NeutraLization is a procedure performed in the Laboratory. A scientist reacts hydrogen bromide (HBr) with catcium hydroxide (Ca(OH)2) and coLLects the products. HBr + Ca(OH)2 — + Complete the neutralization equation, in your Answer Booktet. Balance the equation and name the products. Question 11 Magnesium suLfate (Mg504) is a chemicaL compound commonLy calLed Epsom saLt. It has been used for centuries to treat the foLtowing medical conditions: Skin probLems Cardiac arrhythmias Asthma > NaiL growth probLems > As a Laxative or purgative for relief of occasional constipation Source: en. wikipedia.org/wiki /Magnesium_sutfate Your aunt Susan suffers from ,a skin probLem. You offer to prepare a soLution of magnesium sulfate (MgSO4 ) to ease her discomfort. To prepare the soLution you must dissoLve 35 g of Mg504 in 2.6 titers of water. What is the molar concentration of the solution? Question 12 A welder has to cut a metal door with her acetylene (C2H2) torch. The foLLowing chemicaL equation represents the combustion of acetytene: 2C2H2÷502—*4C02+2H20 How many motes of CO2 will be released into the atmosphere if the welder uses 12 kg of acetylene to cut the metal door? ‘3 Sec 4 Science and the Environment (SE) Theory Exam, Question Booklet WQSB, June 2012 Page 8 Part B Constructed Answer Questions Questions 10 to 17 Answer aLt questions in the Answer Booklet.
- 10. Question 13 Two students are pLaying hopscotch on a giant periodic tabLe in the chemistry tab. The first student jumps to the aLkaline earth group and Lands on the etement in the second period. The second student jumps to the oxygen group and tands on the etement in the third period. Identify each element and draw simplified atomic models in your Answer Booktet. Question 14 You are asked to help your laboratory technician cLean up the Lab. You must cLassify the solutions and place them on the correct shetves in the storage room. a) Identify the soLution(s) containing polyatomic ions in your Answer Booktet. I The fLask above requires a tabet with the name of the solution. b) Respecting the rules of nomenclature, record the name of the solution in your Answer Booklet. Sec 4 Science and the Environment (SE) Theory Exam, Question Booklet WQSB, June 2012 Page 9 . . .
- 11. Question 15 A group of students are attempting to throw a 55 g baLL as high as they can, verticaLLy upwards. The record height that they have achieved so far is 6 meters. Jeremy wishes to break the record of 6 meters. He throws the 55 g baLL verticatty upwards with a speed of 11.2 rn/s. Sec 4 Science and the Environment (SE) Theory Exam, Question Booklet WQSB, June 2012 Page 10 7 Wilt Jeremy exceed the record height of 6 meters? Explain your answer. Neglect air resistance.
- 12. Question 16 AmeLia is preparing a pizza on an atuminum baking pan. She pLaces the pizza in the oven. Ten minutes Later she reaLizes that she forgot to add the cheese. She must take the pizza out of the oven to add the cheese. The baking pan, which weighs 375 grams, was at room temperature (22°C) before it was ptaced in the oven. It absorbed 9450 J of energy during the ten minutes it was trithe oven. The specific heat capacity of aluminum is 0.90 J/g°C. What is the temperature of the baking pan when it is removed from the oven? Sec 4 Science and the Environment (SE) Theory Exam, Question Booklet WQSB, June 2012 Page 17 I .
- 13. Question 17 Andrew has finished his shopping. He ptaces his groceries in his sted. He then putts the sLed with a force of 50 N at an angLe of 300 with the horizon. a) What is the effective force in this situation? j b) How much work is done by Andrew when he travels 10 meters? Sec 4 Science and the Environment (SE) Theory Exam, Question Booklet WQSB, June 2012 Page 12
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- 15. Appendix I FORMULAS C: concentration W: workC = m: mass W = 1E AE: variation in energyV V: voLume V: potential difference W: workR: resistance W = F1d F: forceV = RI I: etectric current Ad: distance travelledintensity Fg: gravitationaL force m: massReq = R1 + R2 + Req: equivalent resistance Fg = mg g: gravitational field intensity E: gravitationaL potential energy 1 1 1 m: mass=—+—+ R R R1 R2 eq equivalent resistance E = mgh g: gravitationat fieLd, intensity h: height E: energy consumed Ek: kinetic energy E = PLt P: power Ek = mv2 m: mass t: time v: veLocity Q: quantity of heat P: power m: mass V: potentiaL difference Q = mclsT c: specific heatP = VI I: eLectric current capacity intensity AT: change in temperature Fe: electricat force k: CouLomb’s constant F = kq1q2 q: charge of partictee r: distance between two partictes
- 16. Appendix 2 Appendix 3 NAME CHEMICAL FORMULA Acetate CH3COO Ammonium NH Bicarbonate HCO Carbonate co ChLorate cto Chromate CrO Hydroxide OW Nitrate NO Phosphate PC3- Sutphate sO QUANTITIES NAME SYMBOL VALUE N2 CouLomb’s constant k g x j9 m c2 Gravitationat fieLd intensity 9.8 N/kg Specific heat capacity for water C 4.19 J/g°C Examples of Common Polyatomic Ions . . .
- 18. fl I I . . .