Physical Sciences Grade 10 P2 North West June 2024 QP (Eng)

PROVINCIAL ASSESSMENT GRADE 10 PHYSICAL SCIENCES: CHEMISTRY (P2) JUNE 2024 MARKS: 75 TIME: 1½ hours This question paper consists of 8 pages and 2 data sheets. Copyright reserved Please turn over

Physical Sciences/P2 2 NW/June 2024 Grade 10 INSTRUCTIONS AND INFORMATION Read the following instructions carefully before answering the questions. 1. This question paper consists of FIVE questions. Answer ALL the questions in the ANSWER BOOK. 2. Start EACH question on a NEW page 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 sub-questions, e.g. between QUESTION 2.1 and QUESTION 2.2. 5. You may use a non-programmable calculator. 6. You may use appropriate mathematical instruments. 7. Show ALL formulae and substitutions in ALL calculations. 8. Round off your FINAL numerical answers to a minimum of TWO decimal places. 9. Give brief motivations, discussions, etc. where required. 10. You are advised to use the attached DATA SHEETS. 11. Write neatly and legibly. Copyright reserved Please turn over

Physical Sciences/P2 3 NW/June 2024 Grade 10 QUESTION 1: MULTIPLE- CHOICE QUESTIONS Various 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 numbers (1.1 to 1.5) in the ANSWER BOOK, e.g. 1.6 C. 1.1 The process where a solid substance change directly to a gas is called: A Evaporation B Condensation C Sublimation D Melting (2) 1.2 The number of neutrons of 24 12𝑀𝑔 is: A 6 B 24 C 36 D 12 (2) 1.3 In which ONE of the following compounds do metallic bond occur between elementary particles? A Sodium chloride B Mercury C Water D Sulphur (2) Copyright reserved Please turn over

Physical Sciences/P2 4 NW/June 2024 Grade 10 1.4 Which ONE of the following is correct regarding a PHYSICAL CHANGE of a substance? (i) No new substances are formed. (ii) Intermolecular forces are broken. (iii) Energy changes are large. (iv) Number of atoms are conserved. A (i), (ii) and (iv) only B (i), (iii) and (iv) only C (i), (ii) and (iii) only D (i) and (ii) only (2) 1.5 Which ONE of the following represents 1 mole of a substance? A 16 g oxygen gas B 2 g hydrogen gas C 22,4 dm3 copper D 22,4 cm3 nitrogen gas (2) [10] Copyright reserved Please turn over

Physical Sciences/P2 5 NW/June 2024 Grade 10 QUESTION 2 (Start on a new page.) Study the list below that shows a variety of substances. glass; bromine; copper wire; table salt; air; sodium chloride 2.1 Define a pure substance. (2) 2.2 Use the information above and write down: 2.2.1 ONE substance that is a mixture. (1) 2.2.2 ONE substance that is malleable. (1) 2.2.3 A substance that is a liquid at room temperature. (1) 2.3 The grade 10 learners are investigating the effect of increasing temperature on three different substances (A, B and C). 2.3.1 Organise the diagrams according to the increasing average kinetic energy of the substances. (3) 2.3.2 Identify the phase which substance C is in? (1) [9] Copyright reserved Please turn over

Physical Sciences/P2 6 NW/June 2024 Grade 10 QUESTION 3 (Start on a new page.) Chlorine is a non-metallic element with an atomic number of 17 and can exist as isotopes. 3.1 Define isotopes. (2) 3.2 Natural chlorine consists of Cℓ - 35 and Cℓ - 37. 3.2.1 Write down the sp-notation for Cℓ. (2) 3.2.2 Calculate the relative atomic mass of chlorine if 24,23 % of natural chlorine is Cℓ - 37. (3) 3.2.3 Write down the number of valence electron in a chlorine atom. (1) 3.2.4 What period of the Periodic Table does chlorine belong to? (1) 3.3 Calcium reacts with chlorine to form calcium chloride. 3.3.1 Draw the Aufbau (orbital box) diagram for a calcium-ion. (3) 3.3.2 Write down the chemical symbols of the particles found in the calcium chloride crystal (lattice). (2) Study the table of the first ionisation energies below and answer the questions that follow. FIRST IONISATION ENERGY (kJ.mol-1) Li 520 F 1 681 3.4 Define the term ionisation energy. (2) 3.5 Use the information in the table to: 3.5.1 Explain why the first ionisation energy of Lithium is so much lower compared to that of Fluorine. (3) 3.5.2 Choose from the options below if the second ionisation energy of Lithium will be lower than, higher than or equal to. Write only LOWER THAN, HIGHER THAN or EQUAL TO. (1) [20] Copyright reserved Please turn over

Physical Sciences/P2 7 NW/June 2024 Grade 10 QUESTION 4 (Start on a new page.) Chlorine gas can be prepared in the laboratory by allowing concentrated hydrochloric acid to react with manganese dioxide. Manganese (II) chloride and water also forms from the reaction. 4.1 Define the term covalent molecule. (2) 4.2 Classify the reaction between hydrochloric acid and manganese dioxide as a chemical or physical change. (1) 4.3 Write down: 4.3.1 The Lewis structure for the formation of the water molecule. (4) 4.3.2 Name the chemical bond that exist between atoms of a water molecule. (1) 4.3.3 A balanced chemical equation for the reaction between hydrochloric acid (HCℓ) and manganese dioxide (MnO2). Show all phases of the reactants and products. (3) Hydrochloric acid is one of the most used acids in the industry. In one reaction hydrochloric acid is prepared as seen in the balanced chemical equation below. KCℓ + H2SO4  KHSO4 + HCℓ 4.4 Give the CHEMICAL NAME of the following compounds: 4.4.1 H2SO4 (1) 4.4.2 KCℓ (1) 4.5 Write an ionic equation for the formation of KHSO 4. (3) 4.6 Give the name of the type of bond that is formed in KHSO 4. (1) 4.7 Use the law of conservation of mass to show that mass is conserved in the reaction above. (5) [22] Copyright reserved Please turn over

Physical Sciences/P2 8 NW/June 2024 Grade 10 QUESTION 5 (Start on a new page.) The reaction of sodium carbonate and hydrochloric acid produces table salt, water and carbon dioxide according to the following balanced chemical equation. Na2CO3 + 2HCℓ  2NaCℓ + H2O + CO2 5.1 Define the term mole of a substance. (2) 5.2 Calculate the: 5.2.1 Molar mass of Na2CO3. (2) 5.2.2 Number of atoms in 2 mol of HCℓ. (4) 5.2.3 Mole of Na2CO3 if 243,8 g was used in this reaction. (3) 5.2.4 Volume of CO2, if 1,15 mol of CO2 is produced in this reaction at STP. (3) [14] TOTAL: 75 Copyright reserved Please turn over

Physical Sciences/P2 1 NW/June 2024 Grade 10 DATA FOR PHYSICAL SCIENCES GRADE 10 PAPER 2 (CHEMISTRY) Copyright reserved Please turn over

Physical Sciences/P2 2 NW/June 2024 Grade 10 Copyright reserved