The powder is thought to be either a single sodium halide or a blend of two sodium halides. A portion of the powder was dissolved in water. Aqueous silver nitrate was then added, producing a pale yellow precipitate. When concentrated aqueous ammonia was added after that, part of this precipitate dissolved, leaving a darker yellow precipitate. What might the powder be?
- Asodium bromide only
- Bsodium iodide only
- Ca mixture of sodium chloride and sodium bromide
- Da mixture of sodium chloride and sodium iodide