Physical Sciences Grade 12 Paper 2 KZN March 2015 Memo

Downloaded from hlayiso.com Basic Education KwaZulu-Natal Department of Education REPUBLIC OF SOUTH AFRICA ee ne ee, i PHYSICAL SCIENCES P2: CHEMISTRY ; " COMMON TEST " / 1 a " MARCH 2015 x Se eee eeeeee eee ee eaneenneseceseseeeeeneeeenene® NATIONAL SENIOR CERTIFICATE MARKS: 50 TIME : hour This question paper consists of 9 pages Please turn over

~~ Downloaded from hlayiso.com _ Physical Sciences / P2 2 Common Test March 2015 NSC INSTRUCTIONS AND INFORMATION TO CANDIDATES 1. 2. 3. This question paper consists of FIVE questions. Answer ALL the questions in the ANSWER BOOK. This question paper consists of TWO sections: SECTIONA (8 marks) SECTION B (42 marks) Start EACH question on a NEW page in the ANSWER BOOK. Number the answers correctly according to the numbering system used in this question paper. ) Leave ONE line between two sub-questions, for example between QUESTION 2.1 and QUESTION 2.2. Give brief motivations, discussions, et cetera where required. Write neatly and legibly. Copyright Reserved Please turn over

Downloaded from hlayiso.com Physical Sciences / P2 3 Common Test March 2015 NSC SECTION A QUESTION 1: MULTIPLE-CHOICE Four possible options are provided as answers to the following questions. Each question has only ONE correct answer. Choose the answer and write ONLY the letter (A ~ D) next to the question number (1.1 — 1.4) in the ANSWER BOOK. 1.1. Consider the reaction: CH3CHCH2 + Hz -—> CH,CH2CH3 This reaction can be classified as ... A. — hydration B. substitution C. dehydration D. hydrogenation (2) 1.2 H H H | | | H-C—-C-—C—H | I | H H_ CH3 The name of the above compound is: CJ A. propane B. 3-methylpropane Cc. butane D. 1-methylpropane. (2) 4.3. Which one of the following statements concerning PROPANE is INCORRECT? A. It has a higher boiling point than ethane. B. Its general formula is C,Hen. C. It is a saturated compound. D. Its reaction with oxygen is strongly exothermic. (2) Please turn over Copyright Reserved

~ Downloaded from hlayiso.com Physical Sciences / P2 1.4 Polymers are made of giant molecules composed of repeating units called isomers. A B hydrocarbons, C both AandB. D monomers. Copyright Reserved 4 NSC Common Test March 2015 TOTAL SECTION A: (2) 18] [8] ( ) (: Please tum over

Downloaded from hlayiso.com Physical Sciences / P2 5 Gommon Test March 2016 NSC SECTION B QUESTION 2 The letters A to F in the table below represent organic compounds. A B HC=CCH2CHs CHsCH2CHCH3 oH Cc D CHs [e} | crdcrt, CH2 =C~CH2 E F H H CH3CH2CH2CHCHs -6-6~ 4 4 n CH 2.1 Write down the IUPAC name of compound A. 2.2 Draw the structural formula for an isomer of B that is a tertiary alcohol. 2.3 In the above compounds, identify the alkene (write down ONLY the letter). 2.4 Write down the IUPAC name of compound of D. 2.5 Draw the structural formula for a functional isomer of compound D. 2.6 Write down the general formula for the group of compounds to which A belongs. 27 Name the type of polymerisation that produces E, 2.8 Name the products formed from the combustion of A. Copyright Reserved Please tum over (2) (2) (1) (2) (2) (4) (4) (2)

Physical Sciences / P2 6 Common Test March 2015 NSC 2.9 A student uses bromine water to distinguish between compounds C and F. 2.9.1 2.9.2 2.9.3 2.9.4 Downloaded. from hlayiso.com She adds bromine water to each in two different test tubes. The test tubes are labelled X and Y. She makes the following observations for each of the test tubes: X: decolourises bromine water immediately. Y: decolourises bromine water only after placing the test tube in the sunlight. Which compound, C or F, is in test tube X? Name the type of reaction taking place in test tube Y. (Choose from: Addition , Substitution or Elimination) Write down the structural formula of the organic product formed in test tube Y. Why would chlorine water NOT be suitable to conduct this investigation? Copyright Reserved (1) (1) (2) (2) [19] Please turn over

Physical Sciences / P2 7 Common Test March 2015 NSC QUESTION 3 Esters are formed from the reaction of an alcohol and a carboxylic acid, (@) CHsCH2 CH2 C—O— CH2CH3 3.1. Write down the IUPAC name of the above ester. (2) 3.2 Write down the NAME of the: 3.2.1 carboxylic acid and the (1) 3.2.2 alcohol that is used in the synthesis of this ester. (1) 3.3 Name the catalyst that is used in this reaction. (1) 3.4 What is the NAME or FORMULA of the inorganic product that is formed during this reaction? (1) 3.5 Draw the structure of the carboxylic acid which is an isomer of the above ester (2) 3.6 The polymerisation of ethene to produce polythene is represented by the equation below: nCH,= CH, — —[CH2~CHz],—- 3.6.1 Define the term macromolecule. (1) 3.6.2 Name ONE industrial use of polythene. oon Copyright Reserved Downloaded from hlayiso.com Please turn over

Downloaded from hlayiso.com Physical Sciences / P2 8 Common Test March 2016 NSC QUESTION 4 Three. hydrocarbons (A, B and C) with a molecular formula CsHi2 are used to investigate the effect of chain length on the boiling point of hydrocarbons. The results obtained are given in the table below. HYDROCARBON BOILING POINT (°C) A 36 B 28 Cc 40 41 What is a hydrocarbon? (1) 42 Are these hydrocarbons saturated or unsaturated? Give a reason for your answer. (2) 43 Write down a possible structural formula for B. (2) 44 Explain why hydrocarbon G has the lowest boiling point. In the explanation refer to the MOLECULAR STRUCTURE of the compound, INTERMOLECULAR FORCES and the ENERGY required. (3) 45 How will the vapour pressure of compound A compare to that of butan-1-ol? (Write down. only HIGHER THAN or LOWER THAN or EQUAL TO), (1) [9] Copyright Reserved Please turn over

Downloaded from hlayiso.com Physical Sciences / P2 Common Test March 2015 9 NSC QUESTION & Consider the following two organic reactions: Br | A: CH3CH,CHCH3 + NaOH (ethanol) heat, Br B: CHsCHAHOH, + NaOH cag) heat, 5.1 Write down the IUPAC name of the major organic product in reaction A. (2) §.2 In terms of the types of reactions, how is reaction A differ from reaction B? (2) IAI | TOTAL SECTION B = [42] GRAND TOTAL = [50] Copyright Reserved

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