OCR- A LEVEL-CHEMISTRY- PERIODIC-TABLE-ELEMENTSAND-PHYSICAL QUIZ PAPER 1+ MARKING SCHEME PAPER 1 2023 UPDATE

SECTION A You should spend a maximum of 20 minutes on this section. Answer all the questions. 1 Which row shows the atomic structure of 55Mn2+? Protons Neutrons Electrons A 25 30 23 B 25 55 23 C 27 30 25 D 30 25 28 Your answer 2 The Group 2 elements react with water, forming a solution and a gas. Which statement is correct? A The reactivity of the elements decreases down Group 2. B The pH of the solution formed increases down Group 2. C The reaction is a neutralisation. D The equation for the reaction of strontium with water is: 2Sr + 2H2O  2SrOH + H2 Your answer [1] [1] 3 © OCR 2014 H432/01 Turn over 3 Chloroethene, CH2=CHCl, is prepared in the presence of a solid catalyst using the equilibrium reaction below. CH2ClCH2Cl(g) CH2=CHCl(g) + HCl(g) ∆H = +51 kJ mol–1 Which change would result in an increased equilibrium yield of chloroethene? A increasing the pressure B increasing the surface area of the catalyst C increasing the temperature D use of a homogeneous catalyst Your answer [1] 4 The table below shows enthalpy changes of formation, ∆fH. Compound TiCl4(l) H2O(l) TiO2(s) HCl(g) ∆fH / kJ mol1 –804 –286 –945 92 What is the value of the enthalpy change of reaction, ∆rH, for the reaction in the following equation? TiCl4(l) + 2H2O(l) → TiO2(s) + 4HCl(g) A –63 kJ mol–1 B –53 kJ mol–1 C +53 kJ mol–1 D +63 kJ mol–1 Your answer [1] 4 © OCR 2014 H432/01 5 Zinc reacts with copper(II) sulfate solution, CuSO4(aq). Which apparatus could be used to determine the effect of the concentration of CuSO4(aq) on the rate of reaction? A balance B gas syringe C colorimeter D pH meter Your answer [1] 6 The boiling point of hydrogen bromide is –67 ºC. The boiling point of hydrogen iodide is –34 ºC. The different boiling points can be explained in terms of the strength of bonds or interactions. Which bonds or interactions are responsible for the higher boiling point of hydrogen iodide? A covalent bonds B hydrogen bonds C permanent dipole–dipole interactions D induced dipole–dipole interactions Your answer [1] 7 The 1st to 8th successive ionisation energies, in kJ mol1 , of an element in period 3 are: 6274 21,269 25,398 29,855 What is the element? A Al B Si C P D S Your answer...