Chemistry > QUESTION PAPER & MARK SCHEME > Chemistry Advanced PAPER 1: Advanced Inorganic and Physical Chemistry,.Pearson Edexcel Level 3 GCE. (All)

Chemistry Advanced PAPER 1: Advanced Inorganic and Physical Chemistry,.Pearson Edexcel Level 3 GCE. GRADED A+

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Some questions must be answered with a cross in a box . If you change your mind about an answer, put a line through the box and then mark your new answer with a cross . 1 This is a question about a ... toms, isotopes and ions. (a) Which of the following pairs of ions is isoelectronic? (1) A N3– and Cl– B O2– and S2– C Na+ and K+ D Na+ and Mg2+ (b) Which is a correct definition of relative isotopic mass? (1) A the weighted mean mass of an atom of an element relative to one twelfth of the mass of an atom of the isotope carbon-12 B the mass of one atom of an isotope relative to one twelfth of the mass of an atom of the isotope carbon-12 C the weighted mean mass of an atom of an element relative to 12 g of the isotope carbon-12 D the mass of one atom of an isotope relative to the mass of 12 g of the isotope carbon-12 2 Barium ions can be identified by their flame colour. (a) Which of the following should be used for a flame test on barium carbonate? (1) A iron wire and water B iron wire and concentrated hydrochloric acid C nichrome wire and water D nichrome wire and concentrated hydrochloric acid (b) What colour do barium ions give in a flame test? (1) A green B lilac C red D yellow (c) A flame test was carried out on a mixture of barium chloride and magnesium chloride. How does the presence of magnesium ions affect the appearance of the flame colour of barium ions? (1) A the colour is more intense B a bright white colour completely masks the barium colour C there is no change D the barium colour is decreased by the white magnesium flame colour (Total for Question 2 = 3 marks) [Show More]

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