In the Group analysis of cations, $\mathrm{Ba}^{2+}$ & $\mathrm{Ca}^{2+}$ are precipitated respectively as

JEE Main · 2026 · 24 Jan 2026 · Shift 2 · Practical and Analytical Chemistry

In the Group analysis of cations,

Ba^{2 +}

Ca^{2 +}

are precipitated respectively as

(A)sulphide & sulphide
(B)hydroxide & carbonate
(C)carbonate & carbonate✓ Correct
(D)chromate & sulphide

Answer: (C)

Solution

In systematic qualitative analysis

B a^{2 +}

and

C a^{2 +}

belong to the fifth group, whose reagent is ammonium carbonate in the presence of ammonium chloride. Both ions are thrown down as their sparingly soluble carbonates,

B a C O_{3}

and

C a C O_{3}

, each a white precipitate. The two ions are precipitated respectively as carbonate and carbonate.

JEE Main · 2026 · 24 Jan 2026 · Shift 2 · Single correct option

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