Qualitative Analysis- Cations

Which cation gives a lilac flame colour?

• K⁺

• Na⁺

• Ca⁺²

• Cu⁺²

• Fe⁺²

Which cation gives a golden yellow flame colour?

• K⁺

• Na⁺

• Ca⁺²

• Cu⁺²

• Fe⁺²

Which cation gives no flame colour?

• K⁺

• Na⁺

• Ca⁺²

• Mg⁺²

• Fe⁺²

Which cation gives a green precipitate with NaOH?

• Fe⁺²

• Al⁺³

• Ca⁺²

• Cu⁺²

• Fe⁺³

Which cation gives a brick red precipitate with NaOH?

• Fe⁺²

• Al⁺³

• Ca⁺²

• Cu⁺²

• Fe⁺³

Which cation gives a blue 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

Which cation gives a soluble white precipitate with excess NH₄OH?

• Ca⁺²

• Al⁺³

• Zn⁺²

• Mg⁺²

• Pb⁺²

Which cation gives an insoluble white precipitate with excess NaOH and no precipitate with sulfuric acid?

• Ca⁺²

• Al⁺³

• Zn⁺²

• Mg⁺²

• Pb⁺²

Which cation gives an bright yellow precipitate with KI?

• Ca⁺²

• Al⁺³

• Zn⁺²

• Na⁺¹

• Pb⁺²