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In the wet tests for detection of various cations by precipitation

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In the wet tests for detection of various cations by precipitation, Ba2+ cations cations are detected by obtaining precipitate of

(1) Ba(ox) : Barium oxalate

(2) BaCO3

(3) Ba(OAc)2

(4) BaSO4

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Correct option is (2) BaCO3

In wet testing, (NH4)2CO3 is used as group reagent for 5th group cations (Ba2+, Ca2+, Sr2+)

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