calcium oxide removes acidic oxides basic oxides acidic oxides basic oxides Iron obtained from the blast furnace is contaminated with

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1 1 Iron from a blast furnace is treated with and with calcium oxide to make steel. Which substances in the are removed? removes calcium oxide removes acidic oxides basic oxides acidic oxides basic oxides 2 Iron is obtained from its ore in a blast furnace and is used to make steel. Iron obtained from the blast furnace is contaminated with In order to remove this substance, is passed through the molten is also added to remove oxides of phosphorus and silicon which are Which words complete the sentences about the conversion of to steel? 3 Iron is extracted from its ore (hematite) in the blast furnace. Which gas is produced as a waste product? dioxide hydrogen nitrogen PhysicsndMathsTutor.com

2 4 Iron is extracted from hematite in a blast furnace. Which reaction increases the temperature in the blast furnace to over 1500? calcium ate calcium oxide + dioxide calcium oxide + silicon dioxide calcium silicate + dioxide dioxide + monoxide 5 Which row describes the conditions used to make steel from the produced by a blast furnace? 6 Molten from the blast furnace contains impurities. The process of turning the impure into steel involves blowing into the molten and adding calcium oxide. What are the reasons for blowing in and adding calcium oxide? blowing in is removed by reacting with is removed by reacting with reacts with the reacts with the adding calcium oxide reacts with acidic impurities making slag reacts with slag and so removes it reacts with acidic impurities making slag reacts with slag and so removes it PhysicsndMathsTutor.com

3 7 The diagram shows a blast furnace. In which part is ore changed to? 8 Four reactions that take place in the blast furnace to produce are shown. Which reaction is used to keep the furnace hot? + O 2 O 2 O 2 + 2O Fe 2 O Fe + 3O Fe 2 O 3 + 3O 2Fe + 3O 2 PhysicsndMathsTutor.com

4 9 Iron is extracted from hematite in the last Furnace. waste gases raw materials firebrick lining air slag molten The hematite contains silica as an impurity. What reacts with this impurity to remove it? calcium oxide dioxide 10 Which substance is not involved in the extraction of from hematite? monoxide calcium ate nitrogen PhysicsndMathsTutor.com

5 11 Which statement is incorrect? arbon dioxide is a waste product in the extraction of. arbon monoxide is a reducing agent. The extraction of from hematite involves reduction. When is converted into steel, is used to oxidise the. 12 The asic Oxygen Process converts into steel. In step 1, is blown into impure molten. In step 2, oxides are removed by reaction with calcium oxide. waste gases molten and calcium oxide Which chemical reaction takes place in step 1 and which type of oxides are removed in step 2? chemical reaction in step 1 is converted to dioxide is converted to dioxide is converted to (III) oxide is converted to (III) oxide type of oxides removed in step 2 acidic basic acidic basic PhysicsndMathsTutor.com

6 13 Iron is extracted from its ore in a last Furnace. Hematite, coke, limestone and hot air are added to the furnace. Which explanation is not correct? oke burns and produces a high temperature. Hematite is the ore containing the as oxide. Hot air provides the for the burning. Limestone reduces the oxide to. 14 Which statement about the extraction of from its ore is correct? Iron is more difficult to extract than zinc. Iron is more difficult to extract than copper. Iron is easy to extract because it is a transition metal. Iron cannot be extracted by reduction with. 15 Many metals are extracted from their ores by heating the metal oxide with. Which metal cannot be extracted using this method? aluminium copper zinc PhysicsndMathsTutor.com

7 16 metal is extracted from hematite, its oxide ore. What is the metal and how is the oxide reduced? metal l l Fe Fe method of reduction electrolysis heating with electrolysis heating with 17 Which row describes the conditions used to make steel from the produced by a blast furnace? 18 Some metals react readily with dilute hydrochloric acid. Some metals can be extracted by heating their oxides with. For which metal are both statements correct? calcium copper magnesium PhysicsndMathsTutor.com

8 19 The diagram shows the materials used in the production of steel from impure. What could element X be? impure an oxide of element X steel calcium nitrogen sulfur 20 The diagram shows the manufacture of steel. gas X waste gases molten What is gas X? dioxide chlorine hydrogen PhysicsndMathsTutor.com

9 21 In a blast furnace, (III) oxide is converted to and monoxide is converted to dioxide. What happens to each of these reactants? Fe 2 O 3 + 3O 2Fe + 3O 2 oth (III) oxide and monoxide are oxidised. oth (III) oxide and monoxide are reduced. Iron(III) oxide is oxidised and monoxide is reduced. Iron(III) oxide is reduced and monoxide is oxidised. PhysicsndMathsTutor.com

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