The powder is known 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 added, and a pale yellow precipitate appeared. When concentrated aqueous ammonia was then added, part of this precipitate dissolved, leaving behind a darker yellow precipitate. What could 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