Question

Pick out the correct statement(s) :

• A. $B{a}^{2+}$ and $C{a}^{2+}$ ions can be separated by adding $S{O}_4^{2-}$ ion in acetic acid medium
• B. Golden yellow $Pb{I}_2$ dissolves in hot water to give a colorless solution
• C. Salts of cobalt, copper, and nickel give a green flame color
• D. The sulphide ion gives with alkaline sodium nitroprusside, a violet color

Answer 1

Answer: (A), (B), (D)

Option (A),(B),(D) are correct.
Salts of cobalt gives a blue flame color, salts of copper gives a green flame color, and nickel gives a brown flame color.