Choose which one is not true
To seperate al3+ and cu2+ added NH3 in excess
To seperate Cu2+ and Zn2+ added NaOH in excess
Choose the answer
Cu2+ and Pb2+ . The most suitable reagant to precipitate one of the ions.
1. Nictric acid
2. Sodium carbonate
3. Sulphuric acid
4. Hydrogen sulphide
To answer those kinds of questions, what subject should i read?