iGCSE Chemical Tests

Flame test colour of Li⁺

• Blue

• Red

• Lilac

• Green

Flame test colour of Na⁺

• Yellow
• Lilac
• Crimson
• Orange

Gives an orange-red colour in a flame test

• Calcium
• Lithium

• Sodium
• Copper

Gives a blue-green colour in a flame test

• Copper

• Lithium

• Potassium

• Calcium

Gives a red-brown precipitate with NaOH

• Fe³⁺
• Fe²⁺
• Cu²⁺
• Al³⁺

Gives a blue precipitate with NaOH

• Cu²⁺
• Fe²⁺
• Fe³⁺
• Mg²⁺

What colour is the precipitate AgI_(s)

• yellow
• cream
• white
• silver

What is the formula of the precipitate formed in the anion test using Barium ions

• BaSO₄
• Ba₂SO₄
• BaCl₂

• BaI₂

Which gas test would identify the gas formed a positive carbonate ion test

• Limewater goes cloudy
• Squeaky Pop
• Relight a glowing splint
• Bleaches damp blue litmus paper

Which reagents should be added to a solution to test for halide ions

• Nitric acid and silver nitrate
• Nitric acid and barium nitrate
• Hydrochloric acid and silver nitrate
• Nitric acid