Science: Double Award

Transcription

1 entre Number andidate Number For Examiner s Use Surname Other Names andidate Signature Examiner s Initials AQA Level 1/2 ertificate Foundation Tier June 2015 Science: Double Award hemistry Paper 1F Thursday 14 May 2015 For this paper you must have: a ruler a calculator the periodic table (enclosed) am to am 8404//1F F Question TOTAL Mark Time allowed 1 hour Instructions Use black ink or black ball-point pen. Fill in the es at the top of this page. Answer all questions. You must answer the questions in the spaces provided. around each page or on blank pages. Do all rough work in this book. ross through any work you do not want to be marked. Information The marks for questions are shown in brackets. The maximum mark for this paper is 60. You are expected to use a calculator where appropriate. You are reminded of the need for good English and clear presentation in your answers. Advice In all calculations, show clearly how you work out your answer. (JUN F01) P83352/Jun15/E5 8404//1F

2 2 Answer all questions in the spaces provided. 1 Atoms contain protons, neutrons and electrons. An atom of oxygen is shown in Figure 1. Figure 1 Electron Neutron Proton 1 (a) omplete Table 1. [2 marks] Table 1 Name of particle harge Proton... Neutron... Electron 1 (02)

3 3 1 (b) Use the correct answer from the to complete each sentence. electrons molecules neutrons shells 1 (b) (i) Isotopes of oxygen have different numbers of (b) (ii) ovalent bonds are produced by atoms sharing (b) (iii) Oxygen atoms join together to produce oxygen (c) A different oxygen atom can be written as: omplete the sentences O 1 (c) (i) The atomic number of oxygen is (c) (ii) This oxygen atom has... electrons and... neutrons. [2 marks] 8 Turn over for the next question Turn over s (03)

4 4 2 This question is about iron. 2 (a) Iron is a transition metal. 2 (a) (i) Figure 2 shows the main parts of the periodic table. Figure 2 A B In which part of the periodic table, A, B or, are the transition metals found? Write your answer in the. 2 (a) (ii) Which one of the following is a property of iron? Tick (3) one. Dissolves in water Good conductor of electricity Low melting point (04)

5 5 2 (b) Iron produced in a blast furnace is impure. The main impurity is carbon. 2 (b) (i) Which material produces most of the carbon impurity? Tick (3) one. oke ot air Iron oxide 2 (b) (ii) What is the percentage of carbon in the iron produced? Tick (3) one. 4% carbon 20% carbon 50% carbon Question 2 continues on the next page Turn over s (05)

6 6 2 (b) (iii) Most of the iron produced is made into an alloy. What is the name of this alloy? Tick (3) one. Brass Polymer Steel 2 (b) (iv) Nitinol is an alloy. Nitinol returns to its original shape after being deformed. What is nitinol used for? Tick (3) one. utlery Dental braces ammers 6 (06)

7 7 3 This question is about hydrocarbons. 3 (a) exane has the displayed structure shown in Figure 3. Figure 3 3 (a) (i) omplete the formula of hexane (a) (ii) What type of covalent bonds does hexane have? Tick (3) one. Double and single bonds Only double bonds Only single bonds Question 3 continues on the next page Turn over s (07)

8 8 3 (b) Butene ( 4 8 ) is an alkene. 3 (b) (i) omplete the general formula for alkenes. n... 3 (b) (ii) omplete the displayed structure for butene. (08)

9 9 3 (c) rude oil contains many hydrocarbons. These hydrocarbons are separated into fractions by fractional distillation. Figure 4 shows a fractionating column. Figure 4 Refinery gas Gasoline Naphtha Kerosene Diesel rude oil Fuel oil eater Residue rude oil is heated to vaporise it, and pumped into the bottom of the fractionating column. Describe how the hydrocarbons in crude oil are separated into fractions in the fractionating column. [3 marks] Turn over s 7 (09)

10 10 4 This question is about the elements in Group 0. Figure 5 shows the position of the Group 0 elements in the periodic table. Figure 5 Group 0 e Ne Ar Kr Xe Rn 4 (a) What are the Group 0 elements called? Tick (3) one. The alkali metals The halogens The noble gases (10)

11 11 4 (b) Boiling points can be measured in Kelvin (K). Kelvin is a temperature scale. Figure 6 shows the boiling points of some Group 0 elements in Kelvin. Boiling point of element in K Figure 6 0 elium Neon Argon Krypton Element Xenon 4 (b) (i) Neon has a boiling point of 30 K. Draw a bar on the grid in Figure 6 to show the boiling point of neon. 4 (b) (ii) Predict the boiling point of krypton. Boiling point ¼... K Question 4 continues on the next page Turn over s (11)

12 12 4 (b) (iii) A scientist measured the boiling point of radon three times. is results are shown in Table 2. Table 2 Reading 1 Reading 2 Reading 3 Boiling point of radon in K What is the correct way of calculating the mean boiling point from the results? Tick (3) one. 230 þ þ þ (c) (i) On Figure 7, draw the arrangement of atoms in liquid radon and in radon gas. Use a circle () to represent each radon atom. [2 marks] Figure 7 Liquid radon Radon gas 4 (c) (ii) Describe the movement of atoms in liquid radon and in radon gas. [2 marks] Liquid radon... Radon gas... 8 (12)

13 13 5 This question is about chlorine and sodium hydroxide. 5 (a) (i) Two chlorine atoms join, as shown in Figure 8. Figure 8 l l What type of bonding is shown in Figure 8? Draw a ring around the correct answer. covalent ionic metallic 5 (a) (ii) hlorine atoms have 7 electrons in the outer shell. ow does a chlorine atom become a chloride ion? Tick (3) one. By gaining one electron By losing one electron By sharing one electron Question 5 continues on the next page Turn over s (13)

14 14 5 (b) Sodium hydroxide is a compound. 5 (b) (i) Sodium hydroxide has strong electrostatic forces of attraction between ions. Which one of the following is a property of sodium hydroxide? Tick (3) one. Acidic Flammable igh melting point 5 (b) (ii) omplete the sentence. Sodium hydroxide conducts electricity when melted or when dissolved in (c) hlorine gas reacts with sodium hydroxide solution to produce sodium chlorate (NalO 3 ). 5 (c) (i) Use the correct answer from the to complete the sentence. lo lo 3 3 lo 3 NalO 3 contains two different ions, Na þ and.... (14)

15 15 5 (c) (ii) Write the state symbols for chlorine gas and sodium hydroxide solution. Use the correct symbols from the. [2 marks] aq g l s hlorine gas, l 2 (...) Sodium hydroxide solution, NaO (...) 5 (c) (iii) Balance the chemical equation for the reaction. ::::::::::l 2 þ 6NaO fi 5Nal þ NalO 3 þ 3 2 O 5 (c) (iv) alculate the relative formula mass, M r, of sodium chlorate (NalO 3 ). [2 marks] Relative atomic masses (A r ): O ¼ 16; Na ¼ 23; l ¼ 35.5 M r ¼ Turn over for the next question Turn over s (15)

16 16 6 This question is about salts. 6 (a) Magnesium carbonate reacts with dilute sulfuric acid to produce magnesium sulfate solution, as shown in Figure 9. Figure 9 Magnesium carbonate Dilute sulfuric acid 6 (a) (i) omplete the word equation.... magnesium sulfuric magnesium þ fi þ carbonate acid sulfate... [2 marks] þ... (16)

17 17 6 (a) (ii) Magnesium carbonate is insoluble. Magnesium sulfate is soluble. Describe how you would make crystals of magnesium sulfate from magnesium carbonate and dilute sulfuric acid. [5 marks] Question 6 continues on the next page Turn over s (17)

18 18 6 (b) Table 3 shows information about the solubility of salts. Table 3 Solubility of salts All sodium and potassium salts are soluble. All nitrates are soluble. All sulfates are soluble, except barium sulfate and lead sulfate. All chlorides are soluble, except lead chloride and silver chloride. A precipitate is produced when solutions of sodium chloride and lead nitrate are mixed. Name the precipitate and name the solution produced. Use the information in Table 3 to help you. [2 marks] Precipitate... Solution... 9 (18)

19 19 7 This question is about cracking. 7 (a) racking breaks down hydrocarbon molecules into smaller hydrocarbon molecules. 7 (a) (i) Give the conditions needed for cracking. [2 marks] 7 (a) (ii) What type of reaction is cracking? Tick (3) one. ombustion Electrolysis Thermal decomposition Question 7 continues on the next page Turn over s (19)

20 20 7 (b) Octane is a hydrocarbon. A student cracked octane. octane fi smaller alkane þ alkene The student collected the products in the apparatus shown in Figure 10. Figure 10 Products from cracking octane Alkane Alkene Water 7 (b) (i) An alkane collected on top of the water. Suggest two reasons why the alkane collected on top of the water. [2 marks] (20)

21 21 7 (b) (ii) The student added bromine water to the alkene produced. State the colour of the bromine water before and after the reaction with the alkene. [2 marks] olour before... olour after... 7 (b) (iii) State one different use for each product. [2 marks] Use of alkane... Use of alkene... 7 (c) Styrene is an alkene. Poly(styrene) can be produced from styrene. omplete the equation for the production of poly(styrene) from styrene. [3 marks] n 6 5 Styrene Poly(styrene) 12 END OF QUESTIONS (21)

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