Physical Sciences Grade 12 P2 March Test 2016 Paper & Memo

Basic Education KwaZulu-Natal Department of Education REPUBLIC OF SOUTH AFRICA o PHYSICAL SCIENCES P2 (CHEMISTRY) : m COMMON TEST i / 4 MARCH 2016 : Some RE : NATIONAL SENIOR CERTIFICATE GRADE 12 | MARKS: 50 TIME: 1 hour This question paper consists of 9 pages including data sheet. Please turn over Copyright Reserved M1

Physical Sciences / P2 2 Common Test March 2016 NSC INSTRUCTIONS AND INFORMATION 1. Write your name and other information in the appropriate spaces on the ANSWER BOOK. 2. The question paper consists of FOUR questions. Answer ALL the questions in the ANSWER BOOK. 3. Start EACH question on a NEW page in the ANSWER BOOK. 4. Number the answers correctly according to the numbering system used in this question paper. 5. Leave one line between two sub-questions, for example between QUESTION 2.1 and QUESTION 2.2. 6. You may use a non-programmable pocket calculator. ( \ 7. You are advised to use the attached DATA SHEETS. 8. Show ALL formulae and substitutions in ALL calculations. 9. Round off your final numerical answers to a minimum of TWO decimal places where applicable. ; 40. Give brief motivations, discussions, et cetera where required. 11. | Write neatly and legibly. Copyright Reserved Please turn over

Physical Sciences / P2 3 NSC QUESTION 1: MULTIPLE-CHOICE QUESTIONS Common Test March 2016 Four options are provided as possible answers to the following questions. Each question has only ONE correct answer. Write only the letter A, B, C or D next to the question number (1.1 — 1.5) in your ANSWER BOOK. 1.1 Atype/s of intermolecular force/s between ethanol molecules is/are ... A B Cc D ion-dipole forces. ion-induced dipole forces. dipole-dipole forces and induced dipole forces. induced dipole forces and ion-dipole forces. 1.2. Consider the following organic compound: C2H4O2 Which one of the following statements concerning this compound is TRUE? A B Cc D It is an alcohol. It is an ester. It is used in welding. It can turn red litmus blue. (2) (2) 1.3. Which of the following sequences of the given organic compounds correctly represents them from the lowest to the highest boiling point? A B Cc D 1.4 Consider the foliowing structural formula of an organic molecule. Chloroethane; ethanol; ethane; ethanoic acid Ethanol; ethane; chloroethane; ethanoic acid. Ethanoic acid; ethanol; chloroethane; ethane Ethane; chloroethane; ethanol; ethanoic acid H | H-C-—H HH H H Io I od H-C-C-C-C-C-—H ee ee | H F H ClH The correct name of this molecule is .. A 2 — Fluoro — 3 — methyl — 4 — chloropentane B 2 — Fluoro — 4 — chloro — 3 — methylpentane Cc 4 — Fluoro — 2 - chloro — 3 — methylpentane D 2 — chloro — 4 — Fluoro — 3 — methylpentane Copyright Reserved MI (2) (2) Please turn over

Physical Sciences / P2 NSC Common Test March 2016 1.5 Hot, concentrated KOH is reacted with 2-chlorobutane. The reaction type and the major organic product formed. can best be described as: REACTION TYPE PRODUCT FORMED A Elimination But-2-ene B Substitution Butan-2-ol Cc Elimination But-1-ene D Substitution Butan-1-ol Copyright Reserved MI (2) [10] Please turn over

f _, Physical Sciences / P2 5 NSC QUESTION 2 (Start on a new page) 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Copyright Reserved What are positional isomers? Consider the following organic compounds represented by the letters A to F and answer the questions that follow: Common Test March 2016 (1) A | CH3- CH2-CH2-CHs B 2-chlorobutane D H H HH 6 IL | | ol ¥ Cc 3,3 — dibromobut — 1 — ene a \ H H H HH H E 4 | 4 fp | CHCl Gee Ct Br H ls compound A, a saturated or unsaturated hydrocarbon? Give reason for your answer. Write down name of the homologous series to which compound D belongs. Draw a structural formula for compound C. Is compound B a PRIMARY, SECONDARY or TERTIARY haloalkane? Give a reason for your answer. Compound F is commonly known as chloroform. What is its IUPAC name? Write down the IUPAC name of compound E. MI (2) (1) (2) (2) (1) (1) [10] Please turn over

Physical Sciences / P2 QUESTION 3 (Start on a new page) The accompanying graphs show the relationship between the boiling points and the number of carbon atoms in the first few UNBRANCHED alkanes and alkenes. Boiling point (°C) -100 NSC Common Test March 2016 Number of carbon atoms 4 ‘ ' ' ' ‘ t 1 H t ‘ 1 H weeeeeeeeedl ne ne ns ' H ' 4 1 1 | woeteeee eed feeeeeeeetebeceeeneeect fevecneee eanee nee e ee ae nee damn nennee ' ' Ie we eew ween ne a ween een cdenn------ 1 t i i \ A} ' ' Lee ene ee Aaa ee Bi’ | eee i ! H > O° 1 2 3 4 3.1. Alkanes and alkenes are hydrocarbons. Define the term hydrocarbon. (1) 3.2. Whatis the relationship between boiling point and number of carbon atoms for the same homologous series as shown in the graph? (1) 3.3 Explain the relationship in QUESTION 3.2 in terms of intermolecular forces and energy. : (3) 3.4. Which of the graphs, A or B is that of the alkanes? 3.5 Explain your answer in QUESTION 3.4. (2) ; [8] Copyright Reserved Please turn over MI

() Physical Sciences / P2 7 Common Test March 2016 NSC QUESTION 4 (Start on a new page) 4.1. Consider the following flow-diagram of a chemical process that leads to the formation of an ester. ethanoic ethanol acid methanol . y ester B 4.1.1. State ONE harmful effect when methanol is consumed by humans. 4.1.2 Write down the NAME or FORMULA of compound B. 4.1.3. Give the IUPAC name and STRUCTURAL FORMULA of the ester formed. 4.2 The hydration of C2 H4 is one way by which ethanol can be prepared. Using STRUCTURAL FORMULAE, write down this reaction. Identify the catalyst used in this reaction. 4.3. The following extract appeared in a daily newspaper: (1) (1) (3) Explosion ‘s Wine! gaseous product of this reaction fast enough. Huge damage occurred at the Pinetown Winery. A stainless steel tank in which sparkling wine is produced, exploded yesterday. The fermentation of the sugar in the grape juice apparently took place at such a high rate that the valves of the tank could not release the 4.3.1. Write down the FORMULA of the product of fermentation that caused the tank to explode. (1) 4.3.2. Write down the chemical NAME of the alcohol formed in the tank. (1) [14] Copyright Reserved Please turn over

Physical Sciences /P2 8 . Common Test March 2016 Nsc : QUESTION 5.(Start on a new page) 5.1 You are provided with samples of pentane and pent-1- ene in two separate test tubes. . You need to distinguish between these 2 compounds in the laboratory. pentane : | pent -1— ene © 5.1.1 Describe a simple chemical test that you could do, and show how you would distinguish between these 2 compounds. (3) 5.1.2 Write down the reaction, using condensed formula, taking place in test tube B and also name the product formed. (3) 5.2 The following table shows the boiling points of the isomers X, Y and Z of CsHy2. Isomers . Boling points (°C) = 10 Y. 30. Z 36 5.2.1 Define boiling point. ~ : ; (yo 5.2.2 \dentify compound Y. Explain fully how you arrived at your answer. ; (4) so [11] ‘ TOTAL: 50 Copyright Reserved Please turn over

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