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Select the correct statement with respect to ${Ca}^{2 +}$ ions.

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It gives lilac color in Bunsen flame.

$K_{2} {CrO}_{4}$ gives white precipitate in the presence of acetic acid.

Prolonged passage of carbon dioxide gas through its aqueous solution produce white precipitate.

Potassium hexacyanidoferrate (II) solution gives white precipitate.

answer is B.

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Detailed Solution

Potassium hexacyanidoferrate (II) solution gives white precipitate.

${Ca}^{2 +} + K_{4} [Fe (CN)_{6}] ⟶ \underset{white ppt .}{K_{2} Ca [Fe (CN)_{6}] ↓}$

Thus, the correct statement with respect to ${Ca}^{2 +}$ ions.

Hence, the correct option is B.

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