Oquizy

How does cold, acidified potassium manganate(VII) react with unsaturated compounds?

Bubbles are released Purple colour decolourises Purple colour remains Solution turns blue

Which metal ion gives a light blue precipitate with aqueous NaOH?

Copper(II) Iron(II) Lead Zinc

John has a test tube containing a colourless solution. These are the observations he made
- White ppt forms with NaOH
- Precipitate dissolves in excess NaOH
- Add NH₃: white ppt again, also dissolves in excess. What cation is present?

Aluminium Calcium Lead Zinc

Which result confirms the presence of iodide?

Cream ppt with AgNO₃ No reaction with AgNO₃ White ppt with AgNO₃ Yellow ppt with AgNO₃

Which reagent is used in the test for nitrate ions?

Aqueous ammonia and bromine water Barium chloride and HCl Silver nitrate and nitric acid Sodium hydroxide and aluminium foil, then warm

A pungent gas is produced that turns damp red litmus blue. What gas is it?

Ammonia Chlorine Hydrogen Sulfur dioxide

Quiz: Chemistry - Qualitative Analysis