Physical Sciences Grade 10 P2 March Test 2017 Paper & Memo

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-_ Downloaded from hlayiso.com Physical Sciences P2 Common Test March 2017 wy INSTRUCTIONS AND INFORMATION 1. Write your name and class (for example 10A) in the appropriate spaces on the ANSWER BOOK. 2. Answer ALL the questions in the ANSWER BOOK. 3. Number the answers correctly according to the numbering system used in this question paper. 4, Leave ONE line between two subquestions, for example between QUESTION 2.1 and QUESTION 2.2. You may use a non-programmable calculator, You are advised to use the attached DATA SHEETS. Show ALL formulae and substitutions in ALL calculations. Round off your final answers to a minimum of TWO decimal places. o ON DO Write neatly and legibly. Copyright reserved Please Turn over

Downloaded from hlayiso.com Common Test March 2017 Physical Sciences P2 NSC 3 QUESTION 1: MULTIPLE-CHOICE QUESTIONS Four options are provided as possible 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 — 1.3 ) in the ANSWER BOOK, for example 1.4 C 1.1. Which one of the following sets of elements is classified as ALKALI-EARTH METALS? A Li, Na, K B F, Cl, Br Cc Be, Mg, Ca D He, Ne, Ar 1.2 An example of a substance that allows heat to be transferred easily and has magnetic properties is ... 0UOWU> stainless steel ceramic copper glass 1.3. Which combination is CORRECT concerning the compounds of iron? CHEMICAL NAME CHEMICAL | ATOMS FORMULA A Iron (Il) hydroxide FeOH2 1 iron atom,1 oxygen atom and 2 hydrogen atoms B lron(IIl) oxide Fe203 2 iron atoms and 3 oxygen atoms Cc Iron (Il) oxide Fe2O3 2 iron atoms and 3 oxygen atoms D Iron (INhydroxide Fe(OH)2 1 iron atom,1 oxygen atom and 2 hydrogen atoms Copyright reserved (2) (2) [6] Please Turn over

Downloaded from hlayiso.com Physical Sciences P2 QUESTION 2 NSC 4 Common Test March 2017 Study the diagrams below of different substances and answer the questions set: Each circle represents an atom and when atoms touch each other they are bonded o on 8 oy e°* ® eo Po g e fe) 8B wm %&f& oe, & e ° te ROO & eee ee éo @* 6 eee te @ Ce é@ 2.1. Define an element. (2) 2.2 Identify the substance(s) that: 2.2.1 Can be classified as an element. (2) 2.2.2 Could be helium gas? (1) 2.2.3 Could be a sample of air? Give a reason. (2) . 7] Copyright reserved Please Turn over

Downloaded from hlayiso.com Physical Sciences P2 NSC Common Test March 2017 5 QUESTION 3 Study the temperature verses time graph for acetone and answer the questions that follow. The boiling point of acetone is 56,29 °C and its melting point is -94,7 °C. 56,29) Time (s) Temperature (°C} -94,7 3.1. Is the above graph a heating curve or a cooling curve of acetone? Give a reason. (2) 3.2 In what phase (Gas; liquid or solid) are the particles at: 3.2.1 A? (1) 3.2.2 room temperature (25°C)? (1) 3.3 Describe the phase change that takes place during the following time intervals: 3.3.1 1058-208 (1) 3.3.2 30s-40s (1) 3.4 Howis the kinetic energy of the acetone molecules affected from 30 s to 40 s? Choose from INCREASE; DECREASE; or REMAIN THE SAME. Give a reason. (2) 3.5 Define melting point. (2) [10] Copyright reserved Please Turn over

Physical Sciences P2 Downloaded from hlayiso.com 6 QUESTION 4 The table below shows the atomic structure of several substances. Answer the questions that follow: SUBSTANCE | NUMBER OF | NUMBER OF | NUMBER OF PROTONS | NEUTRONS | ELECTRONS A 15 16 18 B 18 22 18 Cc 20 20 20 D 20 22 20 4.1. Whatis the atomic number of substance A? 4.2 Write out the chemical formula for the ion in the table. 4.3 Determine, by means of a calculation, two substances with the same mass number. 4.4 Identify the isotopes in the table. 4.5 Substance A reacts with substance D. 4.5.1 Write down the chemical formula for the product formed. 4.5.2 What is the chemical name of this compound? 4.6 Identify the substance that is a gas at room temperature. QUESTION 5 5.1. State Pauli’s Exclusion principle. 5.2 Write down the electronic configuration for the sodium ion. 5.3. How many core electrons does the sodium ion have? 5.4 Is the radius of the sodium ion GREATER THAN; LESS THAN or EQUAL TO Copyright reserved the radius of the sodium atom? Explain fully. Common Test March 2017 (1) (1) (2) (2) (1) (1) [9] (1) (1) Please Turn over

Downloaded from hlayiso.com Physical Sciences P2 NSC Common Test March 2017 7 5.5 Lithium and sodium are in group 1 in the Periodic Table. ELEMENT FIRST IONISATION ENERGY (KJ.mol ) Lithium 520 Sodium 494 5.5.1 Define ionisation energy. 5.5.2 Which element, sodium or lithium is more reactive. Explain. QUESTION 6 Consider the compounds: water (H2O} and sodium chloride (NaCé) 6.1 Name of the type of bonding that takes place in: 6.1.1 NaCe 6.1.2 H20 6.2 Draw the Lewis Dot structure for water. (2) (3) [12] (1) (1) (2) 6.3 Sodium chloride does not conduct electricity in the solid state but when sodium chloride is dissolved in water it conducts electricity. Explain this observation. (2) [6] TOTAL MARKS: 50 Copyright reserved Please Turn over

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