Testing for Ions Co-Ordinated iGCSE

Which cation produces ammonia on warming?

• NH4⁺

• Ca²⁺

• Cu²⁺

• Fe²⁺

• Fe³⁺

Which cation produces an insoluble light blue precipitate?

• NH4⁺

• Ca²⁺

• Cu²⁺

• Fe²⁺

• Fe³⁺

Which cation produces an insoluble red-brown precipitate with sodium hydroxide?

• NH4⁺

• Ca²⁺

• Cu²⁺

• Fe²⁺

• Fe³⁺

Which cation produces an insoluble white precipitate with sodium hydroxide?

• NH4⁺

• Ca²⁺

• Cu²⁺

• Fe²⁺

• Fe³⁺

Which cation produces an insoluble green precipitate with sodium hydroxide?

• NH4⁺

• Ca²⁺

• Cu²⁺

• Fe²⁺

• Fe³⁺

Which cation produces an soluble white precipitate with sodium hydroxide?

• NH4⁺

• Ca²⁺

• Cu²⁺

• ^Zn2+

• Fe³⁺

Which anion effervesces with dilute acid?

• CO₃^2-

• Cl^-

• Br^-

• NO₃^-

• SO₄^2-

Which two anions produces a white precipitate?

• CO₃^2-

• Cl^-

• Br^-

• NO₃^-

• SO₄^2-

Which of the white precipitate forming anions is tested for using dilute nitric acid then aqueous silver nitrate?

• SO₄^2-

• Cl^-

Which two anions tests require acidification with dilute nitric acid then addition of aqueous silver nitrate?

• CO₃^2-

• Cl^-

• Br^-

• NO₃^-

• SO₄^2-