Physical Sciences Grade 10 P2 Gauteng June 2018 QP (Eng)

Downloaded from hlayiso.com GAUTENG DEPARTMENT OF EDUCATION PROVINCIAL EXAMINATION JUNE 2018 GRADE 10 PHYSICAL SCIENCES PAPER 2 TIME: 90 minutes / 1½ hours MARKS: 100 10 pages, 1 data sheet and 1 graph sheet P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES 2 (Paper 2) GRADE 10 GAUTENG DEPARTMENT OF EDUCATION PROVINCIAL EXAMINATION PHYSICAL SCIENCES TIME: 90 minutes MARKS: 100 INSTRUCTIONS AND INFORMATION 1. Write your name in the appropriate space on the ANSWER BOOK. 2. This question paper consists of EIGHT questions. Answer ALL the questions in the ANSWER BOOK. 3. Remove the graph paper from page 12 and hand it in with your ANSWER BOOK. 4. You may use a non-programmable calculator. 5. You may use appropriate mathematical instruments. 6. YOU ARE ADVISED TO USE THE ATTACHED DATA SHEETS. 7. Number the answers correctly according to the numbering system used in this question paper. 8. Write neatly and legibly. 9. Start EACH question on a NEW page in the ANSWER BOOK. 10. Leave ONE line between two sub-questions, for example between Question 2.1 and Question 2.2. 11. Show ALL formulae and substitutions in ALL calculations. 12. Round off your FINAL numerical answers to a minimum of TWO decimal places where needed. 13. Give brief motivations, discussions, et cetera where required. P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES 3 (Paper 2) GRADE 10 SECTION A QUESTION 1 Four options are provided as possible answers to the following questions. Each question has only ONE correct answer. Write only the letter (A – D) next to the question number (1.1 – 1.10) in your answer book. Each answer counts TWO MARKS. 1.1 Which separation method is shown by the picture below? A distillation B chromatography C purification D sifting (2) 1.2 When a metal atom combines with a non-metal atom, the non-metal atom will A lose electrons and decrease in size. B lose electrons and increase in size. C gain electrons and decrease in size. D gain electrons and increase in size. (2) 1.3 Which one of the names below represents the scientist that bombarded gold foil will positive particles and discovered that some of these positive particles are deflected by gold nuclei? A Rutherford B Dalton C Bohr D Thomson (2) P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES 4 (Paper 2) GRADE 10 1.4 In which of the following options are all the labels for the flow-chart correct? 1 2 3 4 5 6 A Pure Impure Elements Compounds Heterogeneous Homogeneous substances substances mixture mixture B Pure Impure Elements Compounds Homogeneous Heterogeneous substances substances mixture mixture C Impure Pure Compounds Elements Heterogeneous Homogeneous substances substances mixture mixture D Impure Pure Elements Compounds Homogeneous Heterogeneous substances substances mixture mixture (2) 1.5 A neutron has a _______________charge. A neutral B positive C negative D magnetic (2) 1.6 Which group of atoms / ions has the same amount of electrons? A Br-, Kr, K+ B Mg2+, Ca2+, Be2+ C Na+, Mg2+, Al3+ D Cℓ, Br, I (2) 1.7 The correct electron configuration for Magnesium is … A 1s22s22p63s2 B 1s22s22p63s1 C 1s22s22p63s6 D 1s22s22p63s24s2 (2) P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES 5 (Paper 2) GRADE 10 1.8 Which ONE of the following symbols represents the Aton with the largest radius in period 4 on the periodic table? A As B Se C Kr D Br (2) 1.9 Chemical bonds CANNOT be produced by … A splitting electrons. B gaining electrons. C losing electrons. D sharing electrons. (2) 1.10 When atom Z of an element in Group 3 becomes Z+3, the ... A atomic number of Z decreases. B mass number of Z increases. C charge on the nucleus increases. D number of occupied energy levels decreases. (2) TOTAL SECTION A: 20 P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES 6 (Paper 2) GRADE 10 SECTION B QUESTION 2 2.1 Materials have different properties for different applications. Give four (4) properties of materials we need to consider to select a material for an application. (4) 2.2 Differentiate between homogenous and heterogeneous mixtures. (2) 2.3 A mixture of salt water and clean sand in an Erlenmeyer flask can be separated by decanting. 2.3.1 What is meant by decanting? (1) 2.3.2 After the removal of the sand, how can the salt be removed from the water? Explain (2) 2.4 The type of bonding that takes place between two metals is called metallic bonding. Briefly discuss how metallic bonding takes place. (4) [13] QUESTION 3 Look at the following diagram and answer the questions: Temperature – celsius 5 4 3 1 2 Time – minutes P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES 7 (Paper 2) GRADE 10 3.1 Match the following to show which part of the graph represents the water in each of the following phases: COLUMN A COLUMN B 3.1.1 Gas phase A: 1 B: 2 3.1.2 Solid phase C: 3 D: 4 3.1.3 Liquid phase E: 5 (3) 3.2 The following table represents the results of the temperature that was taken every 5 minutes for an hour. Time 0 5 10 15 20 25 30 35 40 45 50 55 60 (min) Temp -5 -2 0 0 1 4 8 12 12 16 20 23 26 (oC) Use the information in the table to plot a graph of the data obtained. Use the GRAPH PAPER on page 12. (5) [8] QUESTION 4 There are 118 elements known to man which are tabulated in the Periodic Table. The manner in which they are tabulated is very specific. In your answer book, answer the following questions: 4.1 What do we call the elements that are in Group 1? (1) 4.2 Explain what the numbers 1 to 103 on the Periodic Table, represents? (2) 4.3 Calculate the molar mass of Ca(OH)2. (4) 4.4 Draw the Aufbau diagram as well as the electron configuration for Sodium. (3) 4.5 Draw the Lewis structure for Sodium Chloride. (2) 4.6 Name the type of bonding that will take place between Sodium and Chloride. (1) P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES 8 (Paper 2) GRADE 10 4.7 Give the name for the following symbols / formulae: 4.7.1 Al+3 4.7.2 Mn 4.7.3 Ag+ 4.7.4 HCO3- 4.7.5 MgSO4 (5) [18] QUESTION 5 5.1 – 5.8 Complete the following table using the Periodic Table. Write only the question number and the answer in your answer book. (8) Element Atomic number Mass number Number neutrons 11Na 5.1 23 5.2 14 C 5.3 5.4 8 Ar 5.5 37 5.6 19 F 9 5.7 5.8 5.9 Which element is a noble gas? (1) 5.10 Which element is a halogen? (1) 5.11 Which element is an alkali metal? (1) 5.12 Which element will form a negative ion? (1) [12] P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES 9 (Paper 2) GRADE 10 QUESTION 6 Carbon forms the basis of life on Earth. The Carbon bonds form the basis of Organic Chemistry 6.1 Explain the bonds formed if carbon reacts with hydrogen atoms. Refer to the type and amount of bonds. (4) 6.2 Explain why a person would receive an electrical shock if a HB pencil is put into a plug socket. (2) 6.3 Name the most valuable allotrope of carbon. (1) 6.4 We use isotopes of carbon to determine the age of fossils. By using carbon, explain what an isotope is. (3) [10] QUESTION 7 A science teacher decides to bake a cake in class to demonstrate chemical change. 7.1 Identify two characteristics that would indicate that a chemical change took place during a chemical reaction. (2) 7.2 Differentiate between a physical and chemical change. (1) 7.3 State the Law of Constant Composition. (2) 7.4 Differentiate between a decomposition reaction and a synthesis reaction. (2) [7] P.T.O.

Downloaded from hlayiso.com PHYSICAL SCIENCES 10 (Paper 2) GRADE 10 QUESTION 8 8.1 Give the chemical formula for aluminium sulphate (2) 8.2 Write down the balanced chemical equation for the reaction between Iron and Oxygen which causes rust. Fe+3 + O2  (3) Consider the graph below showing the ionization energy of the first 20 elements: IONIZATION-ENERGY OF THE FIRST 20 ELEMENTS –1 ionization Energy kJmol Nuclear charge Z 8.3.1 What is the first ionization energy for Silicon? (1) 8.3.2 Why is the activation energy lower for Aluminium than for Chlorine even though they are both in the same period on the Periodic Table? (2) 8.3.3 From the graph, what is the trend in ionization energies as you move down a group? (2) 8.3.4 Why do Helium, Neon and Argon have such high ionization values? (2) [12] TOTAL FOR SECTION B: 80 TOTAL: 100 END

Downloaded from hlayiso.com PHYSICAL SCIENCE (Paper 2) GRADE 10 11

Downloaded from hlayiso.com PHYSICAL SCIENCE (Paper 2) GRADE 10 12 QUESTION 3.2 NAME: _______________________________________________________________