Question

Identify anion in solution "x" when mixed with barium nitrate which gives white ppt

Answer 1

Answer: The anion must be a sulfate ion.

Explanation:

Solution "X" must have a sulfate ion. So, when it reacts with barium nitrate, it produces barium sulfate solid which is white in color.

The solution must be $MSO_4$, where, M is a metal other than barium.

Reaction between X and $BaNO_3$ follows the equation:

$MSO_4+BaNO_3\rightarrow BaSO_4+M(NO_3)_2$

This reaction is a type of double displacement reaction, where exchange of ions takes place.

Hence, the anion must be a sulfate ion.