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WorksheetsQualitative Analysis OCR Year 13
Total questions: 20
Worksheet time: 11mins
A solid is insoluble in water but dissolves in aqueous alkali without evolution of a gas. What could the solid be?
Copper (II) carbonate
Copper(II) hydroxide
Zinc carbonate
Zinc hydroxide
What gas is formed when ammonium chloride is warmed with aqueous sodium hydroxide?
Ammonia
Chlorine
Oxygen
Hydrogen
Which gas changes damp litmus paper from red to blue?
Ammonia
Carbon dioxide
Chlorine
Hydrogen
Which ion, in aqueous solution, forms a white precipitate when dilute sulfuric acid is added?
Ag+
Ba2+
Cu2+
Fe2+
Aqueous sodium hydroxide reacts with a metal ion producing a coloured precipitate. This precipitate changes colour on standing. What is the ion present?
Al3+
Cu2+
Fe2+
Fe3+
After acidification with dilute nitric acid, a colourless solution of X reacts with aqueous silver nitrate to give a white precipitate. What could X be?
Calcium iodide
Copper(II) chloride
Lead(II) iodide
Sodium chloride
A pale green solution X gives a green precipitate with excess aqueous sodium hydroxide. An alkaline gas is only given off when the mixture is warmed with aluminium powder. What ions foes X contain?
Ammonium and copper(II)
Ammonium and iron(II)
Nitrate and copper(II)
Iron(II) and nitrate
Which of the following is insoluble?
silver chloride
zinc chloride
potassium chloride
ammonium chloride
Which cation gives a lilac flame colour?
K+
Na+
Ca+2
Cu+2
Fe+2
Which cation gives a brick red precipitate with NaOH?
Fe+2
Al+3
Ca+2
Cu+2
Fe+3
Which cation gives an insoluble white precipitate with NaOH and gives a brick red flame?
Fe+2
Al+3
Ca+2
Cu+2
Fe+3
A green precipitate that dissolves to form a dark green solution on adding excess NaOH contains
Fe3+
Mn2+
Cu2+
Cr3+
A pale pink solution has ammonia solution added to it. It forms a light brown precipitate that gradually darkens. The precipitate is:
[Cr(NH3)6]3+
[Mn(NH3)6]2+
Cr(OH)3
Mn(OH)2
A green solution forms a green precipitate when a little ammonia solution is added to it. What will happen when excess ammonia solution is added?
The precipitate will dissolve to become a dark green solution.
The precipitate will dissolve to become a purple solution.
No change.
The precipitate will dissolve to become a deep blue solution.
