Many organic compounds contain carbon and hydrogen only. Fig. 7.1 shows a section of a polymer formed from an alkene. (i) Identify the functional group in alkenes that reacts when alkenes form polymers. ................................................................................................................................... (ii) A section of a polymer is shown in Fig. 7.1. Fig. 7.1 - Draw the displayed formula of the monomer that forms this polymer. - Name the monomer used to form this polymer. ......................................................................................................................................... .

Chemistry

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CAIE

Exam No：0620_s24_qp_43 Year：2024 Question No：7(b)

Answer:

9.6.1. Describe the ease in obtaining metals from their ores, related to the position of the metal in the reactivity series

9.6.2.1. the burning of carbon (coke) to provide heat and produce carbon dioxide

9.6.2.2. the reduction of carbon dioxide to carbon monoxide

9.6.2.3. the reduction of iron(III) oxide by carbon monoxide

9.6.2.4. the thermal decomposition of calcium carbonate / limestone to produce calcium oxide

9.6.2.5. the formation of slag Symbol equations are not required

9.6.3. State that the main ore of aluminium is bauxite and that aluminium is extracted by electrolysis

9.6.4.1.

9.6.4.2.

9.6.4.3.

9.6.4.4.

9.6.4.5.

9.6.5.1. the role of cryolite

9.6.5.2. why the carbon anodes need to be regularly replaced

9.6.5.3. the reactions at the electrodes, including ionic half-equations

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