Which of the following compounds will not give a positive chromyl chloride test?

Addition of sodium thiosulphate solution to a solution of silver nitrate gives $X$ as a white precipitate, which is insoluble in water but soluble in excess thiosulphate solution to give $Y$. On boiling in water, $Y$ gives $Z$. $X$, $Y$, and $Z$ respectively are:

Which of the following is sparingly soluble in cold water and fairly soluble in hot water?

Which of the following statement$(s)$ is(are) correct with reference to the ferrous and ferric ions?

The reagents $NH_4Cl$ and aqueous $NH_3$ will precipitate which of the following ions?

Choose an incorrect match of the colour of compounds.