Question

FILL IN THE BLANKS :

1. Ag⁺ ions gives ___________ precipitate with Na₃AsO₄. 
2. Yellow precipitate of PbI₂ dissolves in much hot water forming a __________ solution (colourless/coloured). 
3. Potassium cyanide is used for separating __________ and _________ ions. 
4. A solution of salt in HCl when diluted with water turns milky. It indicates the presence of ______________ . 
5. Orange coloured precipitate is of ___________ (As₂S₃, SnS₂, Sb₂S₃). 

Answer 1

1. Brownish–red. 
2. Colourless. 
3. Cu²⁺ and Cd²⁺ ions 
4. Bi³⁺ or Sb⁺³ 
5. Sb₂S₃