You are given the solution of lead nitrate. In order to obtain a yellow precipitate you should mix with it a solution of :
(a) potassium chloride (b) potassium nitride
(c) potassium sulphide (d) potassium iodide
When potassium iodide is added to a solution of lead nitrate then a yellow precipitate is formed.
2KI + Pb(NO3)⟶PbI2+2KNO3
Potassium Lead Lead Potassium
Iodide Nitrate Iodide Nitrate