In fifth group of cations Ba²⁺ and Ca²⁺ are precipitated as

The correct option is: Carbonate, carbonate

Step-by-Step Explanation:

In qualitative inorganic analysis, basic radicals (cations) are classified into different groups based on their precipitation behavior with specific group reagents.

The fifth group of cations consists of barium (Ba²⁺), strontium (Sr²⁺), and calcium (Ca²⁺) ions.

The group reagent used for the precipitation of group V cations is ammonium carbonate ((NH₄)₂CO₃) in the presence of ammonium chloride (NH₄Cl) and ammonium hydroxide (NH₄OH).

When the group reagent is added to a solution containing these cations, they precipitate as their respective insoluble carbonates:
${\mathrm{Ba}}^{2+}+{\mathrm{CO}}_3^{2-}\to {\mathrm{BaCO}}_3\downarrow$ (White precipitate of barium carbonate)
${\mathrm{Ca}}^{2+}+{\mathrm{CO}}_3^{2-}\to {\mathrm{CaCO}}_3\downarrow$ (White precipitate of calcium carbonate)

Therefore, in the fifth group, both Ba²⁺ and Ca²⁺ are precipitated as their carbonates.