Question

A metal salt solution forms a yellow precipitate with potassium chromate in acetic acid, a white precipitate with dilute `H_2 SO_4` but gives no precipitate with sodium chloride or iodide, it is
A. Lead carbonate
B. Basic lead carbonate
C. Barium carbonate
D. strontium carbonate

Answer 1

`BaCO_(3) +2CH_(3)CO OH to Ba(CH_(3)CO O)_(2)+CO_(2)|H_(2)O `
`Ba(CH_(3)CO O)_(2)+J|K_(2)CrO_(4) to underset("Yellow ppt.")(BaCrO_(4) darr) +2KO OC CH_(3)`
`BaCO_(3) +H_(2)SO_(4) to underset("White ppt.")(BaSO_(4)darr) +2CO_(2)+2H_(2)O`