OCR A LEVEL JUNE 2022 CHEMISTRY A PAPER 1 QUESTION PAPER

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A Level Chemistry A H432/01 Periodic table, elements and physical chemistryAn aqueous solution contains a mixture of chloride, bromide and iodide ions. AgNO3(aq) is added to this mixture, followed b... y an excess of dilute NH3(aq). The resulting mixture is then filtered. Which compound(s) is/are present in the residue on the filter paper?20 cm 3 of nitrogen gas reacts with 10 cm 3 of oxygen gas to form 20 cm 3 of a gaseous product. Which equation is the most likely for the reaction? A N2(g) + O2(g) 2NO(g) B N2(g) + 2O2(g) N2O4(g) C 2N2(g) + O2(g) 2N2O(g) D 2N2(g) + 2O2(g) 4NO(g)3 0.541 g of an element X is reacted with oxygen to form 0.790 g of the oxide X2O3. What is the element X? A Al B Cr C Ga D Sc Hydrogen peroxide, H2O2, can be oxidised by manganate(VII) ions under acid conditions as shown below. 2MnO – (aq) + 5H O (aq) + 6H + (aq) 2Mn 2+ (aq) + 5O (g) + 8H O(l) In a titration, 25.00 cm 3 of a disinfectant containing hydrogen peroxide reacts with 22.00 cm 3 of 0.125 mol dm –3 KMnO4(aq). What is the concentration of H2O2, in mol dm –3 , in the disinfectant? Assume that KMnO4 only reacts with H2O2 in the disinfectant. A 0.0440 B 0.110 C 0.275 D 0.550 A catalytic converter in a car removes nitrogen monoxide, NO, and carbon monoxide, CO, from the exhaust gases. (a) One reaction that happens in a catalytic converter is shown below. 2CO(g) + 2NO(g) N2(g) + 2CO2(g) Reaction 16.1 (i) Explain how increasing the temperature increases the rate of Reaction 16.1. Include a labelled sketch, using Boltzmann distributions, on the grid below. [Show More]

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