Question

A metal salt solution forms a yellow precipitate with potassium chromate in acetic acid, a white precipitate with dilute sulphuric acid but does not give precipitate with sodium chloride or iodide. The white precipitate obtained when sodium carbonate is added to the metal salt solution will consist of
A. lead carbonate
B. basic lead carbonate
C. barium carbonate
D. strontium carbonate.

Answer 1

Correct Answer - C
Pb and Ba both give yellow ppt. with `K_(2)CrO_(4)` in acetic acid and white precipitate with dil. `H_(2)SO_(4)`. But lead salts give precipitate with sodium chloride or iodide also whereas barium does not. It means iven salt is barium salts and with sodium carbonate it gives white precipitate of barium carbonate.