A colorless aqueous solution contains nitrates of two metals, X and Y. When it was added to an aqueous solution of NaCl, a white precipitate was formed. This precipitate was found to be partly soluble in hot water to give a residue P and a solution Q. The residue P was soluble in aq. NH3 and also in excess sodium thiosulfate. The hot solution Q gave a yellow precipitate with KI. The metals X and Y, respectively, are4 pointsAg and PbAg and CdCd and PbCd and Zn

A metal salt solution does not give any precipitate even on excess addition of NH4OH but gives white precipitate on addition of NaOH. The metal salt and white precipitate respectively can bePb(NO3)2 and Pb(OH)2Ca(NO3)2 and Ca(OH)2ZnSO4 and Zn(OH)2MgCl2 and Mg(OH)2

If silver nitrate solution is added to a salt solution then a yellow precipitate is obtained, the salt may containBr–I–Cl–F–

wo clear, colourless solutions are mixed together. When they are mixed, a yellow solid (precipitate) forms in the colourless solution. Justify how you know that a chemical change has happened.

lead(II) nitrate solution + sodium chloride solution →       sodium ________ solution + lead(II) chloride precipitate

An ammoniacal metal salt solution gives a brilliant red precipitate on addition of dimethylglyoxime. The metal ion is :Cu2+Ni2+Fe2+Co2+