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(A) What anion or anions are not presetn in a solution that forms no precipitate upon addition of BaCl2(aq)?

(B) Which anion of anions may be present in an acidic solution that forms a pale yellow precipitate upon addition of AgNO3(aq)?

(C) Which anion or anions may be present in an netural solution that forms a pale yellow precipitate upon addition of AgNO3(aq)?

(D) Which cation or cations may be present in a pale blue solution that turns deep blue and forms a white precipitate upon addition of 6 M NH3(aq)?

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