Chemistry 0620 · IGCSE · Identification of ions and gases

Identification of ions and gases — practice question

X is a white powder. The tests below are carried out on X. • When a few drops of aqueous sodium hydroxide are added to a solution of X, no precipitate forms. • When X is warmed with aqueous sodium hydroxide, no gas is produced. • X produces a lilac flame colour when introduced into a flame. • When acidified aqueous silver nitrate is added to a solution of X, a yellow precipitate forms. Identify X.

  • Aammonium bromide
  • Bammonium iodide
  • Cpotassium bromide
  • Dpotassium iodide

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI