Energy and Chemical Changes

5.4.3 Extraction of Metals from their Ores Using Coke 1. In industries, metal ores which are less reactive than carbon are heated with carbon to obtain pure metal. 2. Pure metals which can be extracted using carbon are zinc, iron, tin and lead. Extraction of Tin from its Ore Extracting tin ore in a blast … Read more

Question 1:Diagram below shows the extraction of tin ore at high temperature in a blast furnace.(a) Name two elements in R. [2 marks](b) State one reason why carbon is a suitable element to use in the extraction of tin ore from R? [1 mark](c) Name gas S. [1 mark](d) What is the function of limestone … Read more

Question 1:Diagram 1.1 and Diagram 1.2 show an experiment to study the reactivity of metals with water.(a) Observe Diagram 1.1. State the volume of gas collected.   Write down your answer in Table below. [1 mark](b) Based on the result in Table above, state one inference. [1 mark](c) State the variables in this experiment.(i) Constant … Read more

Question 1:Diagram 1.1 and Diagram 1.2 show an experiment to study the heat change in chemical reactions at room temperature.(a) Based on Diagram 1.1, what is your observation about the change in temperature?   Mark (\/) for your answer in Table below. [1 mark](b) What is the final reading for the thermometer in Diagram 1.2? … Read more