Edexcel Jan 2017 (IAL) Paper 5 Q6

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4 When aqueous sodium hydroxide is added to a solution containing manganese(II) ions, an off-white precipitate of manganese(II) hydroxide forms. The precipitate then gradually turns brown. What type of reaction causes this precipitate to change colour? A Deprotonation B Disproportionation C Ligand exchange D Oxidation 5 Aluminium oxide reacts as shown in the equations. (Total for Question 4 = 1 mark) Al2O3 + 6H+ (cid:111) 2Al3+ + 3H2OAl2O3 + 2OH + 3H2O (cid:111) 2Al(OH)4 These two reactions show that aluminium oxide is A acidic. B amphoteric. C basic. D an oxidising agent. (Total for Question 5 = 1 mark) A E R A S I H T N I E T I R W T O N O D A E R A S I H T N I E T I R W T O N O D 6 What is the molecular formula of the compound below? OH A E R A S I H T N I E T I R W T O N O D A C 9H9O B C9H10O C C9H11O D C9H12O (Total for Question 6 = 1 mark) *P48373A0332* Turn over<br />

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