Chemistry 0620 · IGCSE · Identification of ions and gases

Identification of ions and gases — practice question

Substance X is warmed with dilute hydrochloric acid, forming a gas that decolourises acidified aqueous potassium manganate(VII). In a flame test, Substance X produces a yellow flame. What is X?

Apotassium chloride
Bpotassium sulfite
Csodium chloride
Dsodium sulfite

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