Qualitative Analysis OCR Year 13

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

A solution X when added into sodium carbonate solution turns limewater cloudy. which of the following is solution X?

• Aqueous ammonia solution
• Calcium hydroxide solution
• Vinegar
• Magnesium nitrate solution

Which of the following is insoluble?

• silver chloride

• zinc chloride

• potassium chloride

• ammonium chloride

All of the following salts are soluble except...

• Lead(II) nitrate
• Sodium carbonate
• Magnesium chloride
• Barium sulphate