Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature GCSE COMBINED SCIENCE: SYNERGY F Foundation Tier Paper 3F Specimen 2018 Time allowed: 1 hour 45 minutes Materials For Examiner’s Use For this paper you must have: a ruler Question Mark a scientific calculator 1 the periodic table (enclosed) 2 the Physics Equations Sheet (enclosed). 3 Instructions 4 Use black ink or black ball-point pen. 5 Fill in the boxes at the top of this page. 6 Answer all questions in the spaces provided. Do all rough work in this book. Cross through any work you do not want 7 to be marked. 8 In all calculations, show clearly how you work out your answer. 9 Information TOTAL The maximum mark for this paper is 100. The marks for questions are shown in brackets. You are expected to use a calculator where appropriate. You are reminded of the need for good English and clear presentation in your answers. SPECIMEN MATERIAL IB/M/SAMs/E1 8465/3F Do not write 2 outside the box 0 1 This question is about the periodic table. In 1864 John Newlands suggested an arrangement of elements. Figure 1 shows the arrangement Newlands suggested. Figure 1 0 1 . 1 Give two differences between column 1 in Figure 1 and Group 1 in the modern periodic table. Use the periodic table to help you. [2 marks] 1 2 SPECIMEN MATERIAL IB/M/SAMs2/8465/3F Do not write 3 outside the box 0 1 . 2 In 1869 Mendeleev produced his periodic table. Complete the sentence. Choose the answer from the box. [1 mark] insoluble magnetic undiscovered unreactive Mendeleev left gaps in his periodic table for elements that were . 0 1 . 3 How are the elements ordered in the modern periodic table? [1 mark] Tick one box. Atomic mass Atomic number Melting point Reactivity Question 1 continues on the next page Turn over ► SPECIMEN MATERIAL IB/M/SAMs2/8465/3F Do not write 4 outside the box Figure 2 shows part of the modern periodic table. Figure 2 0 1 . 4 Complete the sentences about the elements in Figure 2. Choose the answers from the box. [3 marks] A D E G J Sodium is an alkali metal and is represented by the letter . An element in group 3 is represented by the letter . A gaseous non-metal element is represented by the letter . SPECIMEN MATERIAL IB/M/SAMs2/8465/3F Do not write 5 outside the box 0 1 . 5 Figure 3 shows the electronic structure of an atom. Figure 3 This element is in the shaded group on Figure 2. Why is this element unreactive? [1 mark] 0 1 . 6 Name the group of elements in the shaded column on Figure 2. [1 mark] 9 Turn over for the next question Turn over ► SPECIMEN MATERIAL IB/M/SAMs2/8465/3F Do not write 6 outside the box 0 2 This question is about ammonia (NH3) and compounds of ammonia. 0 2 . 1 Which diagram shows the arrangement of outer shell electrons in a molecule of ammonia? [1 mark] Tick one box. 0 2 . 2 What type of bonding is present in ammonia? [1 mark] Tick one box. Covalent Ionic Metallic Ammonia is produced by reacting nitrogen and hydrogen. 0 2 . 3 Balance the equation for the reaction. [1 mark] N2 + 3H2 NH3 SPECIMEN MATERIAL IB/M/SAMs2/8465/3F Do not write 7 outside the box 0 2 . 4 What does the sign represent? [1 mark] 0 2 . 5 Ammonia dissolves in water to form an alkaline solution. Ammonia solution reacts with an acid to produce a salt, ammonium nitrate. Which acid is used to produce ammonium nitrate? [1 mark] Tick one box. Citric acid Hydrochloric acid Nitric acid Sulfuric acid Question 2 continues on the next page Turn over ► SPECIMEN MATERIAL IB/M/SAMs2/8465/3F Do not write 8 outside the box A student investigated the temperature change when ammonium nitrate is dissolved in water. This is the method used. 1. Add ammonium nitrate to water. 2. Stir the mixture. 3. Record the temperature of the solution every 5 seconds. Table 1 shows the results. Table 1 Time in Temperature of solution seconds in °C 0 20.0 5 17.5 10 15.5 15 14.0 20 13.0 25 12.5 30 12.0 35 12.0 SPECIMEN MATERIAL IB/M/SAMs2/8465/3F Do not write 9 outside the box Figure 4 shows some of the student’s results. Figure 4 0 2 . 6 Complete Figure 4. Plot the data from Table 1 on Figure 4. Draw a line of best fit. Your line should be a smooth curve. [3 marks] 0 2 . 7 Use Table 1 to suggest a value for room temperature. [1 mark] Question 2 continues on the next page Turn over ► SPECIMEN MATERIAL IB/M/SAMs2/8465/3F Do not write 10 outside the box 0 2 . 8 What is one use for the dissolving of ammonium nitrate in water? [1 mark] Tick one box. Cold pack to treat injuries Glow sticks Hand warmers Self-heating can to warm food 0 2 . 9 Which reaction profile diagram represents the dissolving of ammonium nitrate in water? [1 mark] Tick one box. 11 SPECIMEN MATERIAL IB/M/SAMs2/8465/3F Do not write 11 outside the box Turn over for the next question DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED Turn over ► SPECIMEN MATERIAL IB/M/SAMs2/8465/3F Do not write 12 outside the box 0 3 A student investigated the electrolysis of sodium chloride solution. Figure 5 shows the apparatus used. Figure 5 0 3 . 1 Figure 5 shows the volume of gas B collected in 10 minutes. What is the volume of gas B? [1 mark] Volume of gas B = cm3 SPECIMEN MATERIAL IB/M/SAMs2/8465/3F Do not write 13 outside the box 0 3 . 2 Table 2 shows the student’s results using sodium chloride solution of concentration 30 g/dm3 Table 2 Volume of gas B collected in Experiment 10 minutes in cm3 1 2.2 2 2.2 3 2.0 Calculate the mean volume of gas B collected in 10 minutes. [2 marks] Mean volume = cm3 Question 3 continues on the next page Turn over ► SPECIMEN MATERIAL IB/M/SAMs2/8465/3F Do not write 14 outside the box The student repeated the experiment using different concentrations of sodium chloride solution. Figure 6 shows some of the student’s results. Figure 6 SPECIMEN MATERIAL IB/M/SAMs2/8465/3F Do not write 15 outside the box 0 3 . 3 One point on Figure 6 is anomalous. What is the concentration and volume of the anomalous point? Give a reason for your choice. [2 marks] Concentration g/dm3 Volume cm3 Reason 0 3 . 4 Describe the trend shown on Figure 6. [1 mark] 0 3 . 5 Draw one line from each type of variable to the description of the variable in the experiment. [2 marks] Description of variable in Type of variable the experiment Concentration of sodium chloride solution Power supply Dependent variable Temperature of solution Independent variable Volume of gas collected Volume of sodium chloride solution Question 3 continues on the next page Turn over ► SPECIMEN MATERIAL IB/M/SAMs2/8465/3F Do not write 16 outside the box Sodium chloride solution contains sodium ions (Na+) and chloride ions (Cl−). 0 3 . 6 Sodium chloride solution is electrolysed. Explain why the sodium ions are attracted to the negative electrode. [2 marks] 0 3 . 7 Complete the sentence. Choose the answer from the box. [1 mark] are too big are too small cannot move have delocalised electrons Solid sodium chloride does not conduct electricity because the ions . SPECIMEN MATERIAL IB/M/SAMs2/8465/3F Do not write 17 outside the box 0 3 . 8 Which two gases are produced during the electrolysis of sodium chloride solution? [2 marks] Tick two boxes. Carbon dioxide Carbon monoxide Chlorine Hydrogen Nitrogen 13 Turn over for the next question Turn over ► SPECIMEN MATERIAL IB/M/SAMs2/8465/3F Do not write 18 outside the box 0 4 Figure 7 shows the information label from a hairdryer. Figure 7 50 Hz 230 V 2100 W 0 4 . 1 What is the power of the hairdryer? [1 mark] Tick one box. 50 Hz 230 V 2100 W 0 4 . 2 What is the equation which links current, potential difference and power? [1 mark] Tick one box. power = potential difference × current potential difference power = current current power = potential difference 0 4 . 3 The mains electricity supply in the UK is an alternating current (ac). What is the frequency of the UK ac supply? [1 mark] SPECIMEN MATERIAL IB/M/SAMs2/8465/3F Do not write 19 outside the box 0 4 . 4 Some electrical appliances use batteries. What type of current does a battery supply? [1 mark] Tick one box. Alternating current (ac) only Direct current (dc) only Both ac and dc Not ac or dc Question 4 continues on the next page Turn over ► SPECIMEN MATERIAL IB/M/SAMs2/8465/3F Do not write 20 outside the box The hairdryer is connected to the mains electricity supply by a plug. Figure 8 shows the inside of a plug. Figure 8 0 4 . 5 Draw one line from each wire to the colour of insulation around the wire. [2 marks] Colour of insulation Wire around wire Blue Brown Live Green Neutral White Yellow 0 4 . 6 The insulation around the Earth wire has two colours. What are the two colours? [1 mark] and SPECIMEN MATERIAL IB/M/SAMs2/8465/3F Do not write 21 outside the box 0 4 .