2023 AQA A-level CHEMISTRY 7405/1 Paper 1 Inorganic and Physical Chemistry Question Paper & Mark scheme (Merged) June 2023 [VERIFIED]

2023 AQA A-level CHEMISTRY 7405/1 Paper 1 Inorganic and Physical Chemistry Question Paper & Mark scheme (Merged) June 2023 [VERIFIED] Monday 12 June 2023 Morning Time allowed: 2 hours Materials For this paper you must have: • the Periodic Table/Data Booklet, provided as an insert (enclosed) • a ruler with millimetre measurements • a scientific calculator, which you are expected to use where appropriate. Instructions • Use black ink or black ball-point pen. • Fill in the boxes at the top of this page. • Answer all questions. • You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages. • If you need extra space for your answer(s), use the lined pages at the end of this book. Write the question number against your answer(s). • All working must be shown. • Do all rough work in this book. Cross through any work you do not want to be marked. Information For Examiner’s Use Question Mark 1 2 3 4 5 6 7 8 9 10 TOTAL • The marks for questions are shown in brackets. • The maximum mark for this paper is 105. 2 Answer all questions in the spaces provided. 0 1This question is about complexes of the transition metal chromium. 0 1 . 1 State the meaning of the term transition metal complex. [1 mark] Cr(PF3)6 is a complex of chromium that contains molecules of PF3 0 1 . 2The electron pair repulsion theory can be used to predict the shape of a PF3 molecule. Draw the shape of a PF3 molecule. Include any lone pairs of electrons that influence the shape. Name the shape. [2 marks] Shape Name of shape 0 1 . 3Suggest why the oxidation state of chromium is zero in Cr(PF3)6 [1 mark] Do not write outside the box *02* IB/M/Jun23/7405/1 3 The compound [Cr(NH3)4Cl2]Cl contains ammonia molecules. 0 1 . 4Deduce the oxidation state of chromium in [Cr(NH3)4Cl2]Cl [1 mark] 0 1 . 5Name the type of bond between N and H in ammonia. [1 mark] 0 1 . 6 The compound [Cr(NH3)4Cl2]Cl contains a complex ion that shows isomerism. Draw the two isomers of the complex ion