In the Group analysis of cations, Ba²⁺ & Ca²⁺ are precipitated respectively as

Q. In the Group analysis of cations, Ba²⁺ & Ca²⁺ are precipitated respectively as

(A) sulphide & sulphide

(B) hydroxide & carbonate

(D) carbonate & carbonate

Correct Answer: carbonate & carbonate

Explanation

In qualitative inorganic analysis, barium and calcium ions belong to the alkaline earth metal group.

Both Ba²⁺ and Ca²⁺ are precipitated in the carbonate group when ammonium carbonate is added in the presence of ammonium chloride and ammonium hydroxide.

They form insoluble carbonates as follows:

Ba²⁺ + CO₃²⁻ → BaCO₃(s)

Ca²⁺ + CO₃²⁻ → CaCO₃(s)

Hence, both Ba²⁺ and Ca²⁺ are precipitated as carbonates.

Therefore, the correct answer is option (D).

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