A-LevelChemistryGroup 17Oct/Nov 2016Paper 1 Q161 Mark
J is a salt of one of the halogens chlorine, bromine, iodine or astatine. The reaction scheme shows a series of reactions using a solution of J as the starting reagent. [Figure showing reaction scheme: J(aq) -> HNO3(aq) + AgNO3(aq) -> a precipitate; this precipitate then reacts with an excess of dilute NH3(aq) -> a colourless solution; this colourless solution then reacts with an excess of HNO3(aq) -> a precipitate] What could J be?
Asodium chloride
Bsodium bromide
Cpotassium iodide
Dsodium astatide
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The correct answer is A. This question tests the candidate's understanding of group 17 within the Chemistrysyllabus. The examiner's mark scheme requires...
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