Sodium, potassium and rubidium belong to Group I of the Periodic Table. Chlorine, bromine and iodine belong to Group VII. Which statement is correct?
- ABromine displaces chlorine from an aqueous solution of sodium chloride.
- BIodine is discharged at the negative electrode when concentrated aqueous potassium iodide is electrolysed.
- CRubidium has a greater tendency to form positive ions than potassium.
- DSodium and potassium both react with water but the reaction is more violent with sodium.