Metals and reactivity series Question paper 1

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1 Metals and reactivity series Question paper 1 Level GCSE Subject Chemistry Exam Board CCEA Topic Metals and reactivity series Sub-Topic Metals and reactivity series Booklet Question paper 1 Time Allowed: 72 minutes Score: /60 Percentage: /100

2 FOUNDATION TIER

3 1 (a) The reactivity of metals can be studied using displacement reactions. If a displacement reaction occurs there is a temperature rise. In an experiment the following method was used: Pour some copper(ii) sulfate solution into a polystyrene cup and record the temperature of the solution. Add a known mass of metal and stir. Record the maximum temperature of the mixture. Repeat the experiment. The results of this experiment are shown in the table below. Metal Temperature increase ( C) Experiment 1 Experiment 2 Average temperature rise ( C) magnesium silver iron gold zinc State two factors which should be kept the same in this experiment to make it a fair test [2] (ii) State and explain which of the metals gave the least reliable temperature rise.

4 (iii) State and explain which of the metals used in the experiment is the most reactive. [2] (iv) Explain why there is no temperature rise when silver is added to copper(ii) sulfate solution. (v) Why do the results make it impossible to decide which of the metals is the least reactive? (vi) Write a balanced symbol equation for the displacement reaction between zinc and copper(ii) sulfate solution. [2]

5 (b) Aluminium is extracted from its ore by electrolysis. Explain what is meant by the term electrolysis. [2] (ii) Name the ore from which aluminium is extracted. (iii) The ore of aluminium contains aluminium ions and oxide ions. State the formulae of these ions. aluminium ion oxide ion [2]

6 2 A reactivity series of some metals is shown below: potassium sodium calcium magnesium aluminium iron copper reactivity increases (a) Silver metal does not appear on the above reactivity series. Copper metal will react with silver nitrate solution to form silver as shown below. copper wire silver nitrate solution silver forming on the surface of copper wire Peticolas/Megna/Fundemental Photos / Science Photo Library Indicate the position of silver on the reactivity series shown above. (ii) Silver nitrate solution is colourless. What is the colour of the solution at the end of this reaction?

7 (iii) Explain why copper displaces silver from a solution of silver nitrate. [2] (b) Silver particles of size 1 to 100 nanometres (nm) are used to kill bacteria in wound dressings. Explain what you understand by a nanometre. (ii) Describe one risk which has been associated with the use of silver particles of this size. (c) Aluminium is a very useful metal due to its high electrical conductivity, relatively low density and lack of reactivity. Explain why aluminium shows a lack of reactivity even though the reactivity series would suggest it is a moderately reactive metal. [3]

8 (ii) A balanced symbol equation for a reaction of aluminium is shown below: 2Al 1 3CuO Al 2 O 3 1 3Cu Write a word equation for this reaction. [2]

9 3 Metals may be placed in a reactivity series by observing their reactions with air, water, steam and dilute acid. Examiner Only Marks Remark (a) Describe what would be observed when a piece of calcium metal is heated in air. [2] (b) The apparatus below may be used to react zinc metal with steam. damp mineral wool zinc gas produced A B HEAT HEAT trough water beehive shelf Barking Dog Art What labels should be placed at A and B on the diagram? A B [2] (ii) Explain why the damp mineral wool is heated. (iii) Name the gas produced in this experiment.

10 (iv) Name a metal which does not react when heated with steam. Examiner Only Marks Remark (c) X is an unknown metal. The table below gives details of some reactions of the three metals X, sodium and zinc. Metal Reaction when heated in oxygen Reaction with cold water Reaction with dilute hydrochloric acid X Black coating forms on metal without burning No reaction No reaction Sodium Burns very vigorously with a yellow flame Dangerous reaction not carried out in school laboratory Zinc Burns forming a yellow solid which changes to white on cooling No reaction Reacts steadily Suggest the name of metal X. (ii) Describe what you would observe when sodium reacts with cold water. [3] (iii) Write a balanced symbol equation for the reaction of sodium with water. Total Question 5 [3]

11 Examiner Only Marks Remark Dut to copyright an image of an aerosol can has been removed which is not essential to answer this question. (a) What is the meaning of the term solution? [2] 4 Deodorants, body sprays and air fresheners are often supplied as an aerosol. Aerosol cans contain a solution of the substance to be sprayed and apropellant gas. (ii) In the box below show the arrangement of the particles of a gas at room temperature and pressure. The particle should be approximately the size shown on the left. gas particle (iii) How does the volume of a gas change if the pressure is increased? (iv) How does the volume of a gas change if the temperature is increased?

12 (b) The label shown below was found on an aerosol can. Examiner Only Marks Remark Crown copyright What term is missing from box A on the label to describe the hazard associated with the aerosol? (ii) Explain why an aerosol can should not be exposed to sunlight or high temperatures. (c) An aerosol deodorant is made of many compounds which contain different elements. Some of these elements are listed in the table below. Element Melting point ( C) Boiling point ( C) Silicon State at room temperature (20 C) Oxygen Sodium Bromine 7 59 Use the data given to help you complete the table by deducing the state of each element at room temperature (20 C). [4]

13 (ii) What is meant by the term element? Examiner Only Marks Remark [2] (d) Some aerosol cans are made of aluminium metal. Aluminium metal can be recycled and during this process the aluminium is heated. The graph below shows the change in temperature against time when aluminium is heated D 800 temperature / C B C 400 A time / s

14 Save My Exams! The Home of Revision Which letter, A, B, C or D shows when aluminium is beginning to melt? Examiner Only Marks Remark (ii) What is the melting point of aluminium? (iii) Complete the passage below about changes of state using only the words given in the box solid l Each word may be used once, more than once or not at all. Evaporation is the change of state from to Sublimation is the change of state from to on heating. Condensation is the change of state from to [6]