DATA FOR PHYSICAL SCIENCES GRADE 10PAPER 2 (CHEMISTRY)GEGEWENS VIR FISIESE WETENSKAPPE GRAAD 10VRAESTEL 2 (CHEMIE) TABLE 1: PHYSICAL CONSTANTS/TABEL 1: FISIESE KONSTANTES TABLE 2: FORMULAE/TABEL 2: FORMULES TABLE 3: THE PERIODIC TABLE OF ELEMENTS/TABEL 3: DIE PERIODIEKE TABEL VAN ELEMENTE
The diagram below shows how the hydrosphere is linked to the biosphere. Study thediagram and answer the questions that follow. 10.1 Differentiate between the hydrosphere and biosphere. (2) 10.2 Write down the name of process: 10.2.1 A (1) 10.2.2 B (1) 10.2.3 C (1) 10.3 Describe the energy changes during processes A and B. Write … Read more
Two test tubes, A and B, both contain a sodium salt solution. After a small amount ofbarium chloride is added, the solution in both test tubes forms a white precipitate. 9.1 Write down the type of reaction that takes place in the test tubes. (1) 9.2 A concentrated nitric acid solution is then added into … Read more
Learners investigate how the type of substance affects electrical conductivity of thesubstance. They conduct three experiments using three different substances under thesame conditions, as shown in the table below. 8.1 Define the term electrolyte. (2) 8.2 For the investigation, write down the: 8.2.1 Investigative question (2) 8.2.2 Dependent variable (1) 8.2.3 Independent variable (1) 8.2.4 … Read more
A group of learners prepare a 0,25 mol∙dm-3 solution of sodium carbonate by dissolvinga 14,2 g sample of hydrated sodium carbonate (Na2CO3∙xH2O) in 200 cm3 of water. 7.1 Explain the meaning of the term hydrated. (1) 7.2 Write down a BALANCED CHEMICAL EQUATION to show how sodium carbonate dissociates in water. (2) 7.3 Learners then … Read more
Study the diagram below showing structures of two different substances (A and B) andanswer the questions that follow. 6.1 Choose the substance (A or B) that describes the following: 6.1.1 Metallic structure (1) 6.1.2 Structure of magnesium chloride (1) 6.2 Explain how the type of bond in substance A forms. (2) 6.3 Name the type … Read more
Study the physical and chemical processes below and answer the questions thatfollow. X: H2O(s) → H2O(g)Y: CaCO3(s) ∆ → CaO(s) + CO2(g)Z: Iron + Oxygen → Iron(III) oxide 5.1 Define the term physical change. (2) 5.2 Write down the LETTER of the process that represents the following: 5.2.1 Physical change (1) 5.2.2 Decomposition reaction (1) … Read more
Study the table below and answer the questions that follow. 4.1 Define the term atomic number. (2) 4.2 Write down the: 4.2.1 Chemical symbol of element Q using the notation (2) 4.2.2 Element (P, Q or R) that is an alkali metal (1) 4.2.3 Chemical symbol of R (2) 4.3 Element P reacts with oxygen … Read more
The vapour pressure versus temperature graph below was obtained for four unknownliquids (A, B, C and D). Atmospheric pressure is measured as 101,3 kPa. 3.1 Define the term boiling point. (2) Use the information given in the graph to answer the questions that follow. 3.2 Write down the: 3.2.1 Boiling point of liquid B (1) … Read more
The diagram below shows three different substances, P, Q and R. 2.1 Define the term element. (2) Use the diagram and the key provided to answer the questions that follow. 2.2 Write down a LETTER that represents the following: 2.2.1 Pure substance (1) 2.2.2 Homogeneous mixture (1) 2.2.3 Heterogeneous mixture (1) 2.3 Indicate whether the … Read more