CIE Jun 2013 v2 Paper 2 Q3

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Examiners For Use This question refers to the elements in the section of the Periodic Table shown below. Be Li Na Mg K Ca N Ptransition elementsGa Ge As B Al C Si He Ne Ar Kr O S Se F Cl Br (a) From this list of elements, identify in each case one element that has the property described. Give the symbol of the element. (i) An element that when placed in cold water sinks and reacts readily.(ii) An element whose molecules containbonding.(iii) An element that forms a gaseous toxic oxide.(iv) The element which has a giant molecular structure and forms an oxide which also has a giant molecular structure.(v) An element that forms a covalent chloride which dissolves in water to give a conducting solution.(vi) The element in Period 3 (Na to Ar) with the greatest electrical conductivity.[6]UCLES 2013 9701/22/M/J/13<br /> Examiners For Use (b) Some of the elements in Period 3 (Na to Ar) burn with a colouredame when heated in oxygen or chlorine. (i) Give the symbol of one such element, the formula of the oxide formed, and state theame colour that would be seen. symbol of elementformula of oxideame colour(ii) For the element you have used in (i), give the formula of the chloride formed, and state the pH of the solution produced when this chloride is shaken with water. formula of chloridepH of solution[4] (c) Chlorine reacts with both bromine and iodine to form BrCl and ICl respectively. The melting points of chlorine and the two chlorides are shown in the table. substance m.p. / C Cl 2 101 BrCl 66 ICl 24 (i) Showing outer electrons only draw a 'dot-and-cross' diagram of the bonding in ICl . (ii) Suggest why the melting points increase from Cl 2 to ICl .(iii) Suggest which of these three molecules has the largest permanent dipole. Explain your answer.[5]UCLES 2013 9701/22/M/J/13 [Total: 15] [Turn over<br />

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