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Zinc II Oxide

An aqueous so...

Question

An aqueous solution contains the following ions $H g_{2}^{2 +}, H g^{2 +}, p b^{2 +} and C u^{2 +} .$ The addition of $d i l . H C l$ will precipitate out

H g_{2} C l_{2} and H g C l_{2}

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H g_{2} C l_{2} and P b C l_{2}

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P b C l_{2}

only

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P b C l_{2} and H g C l_{2}

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Solution

The correct option is B $H g_{2} C l_{2} and P b C l_{2}$
Dilute hydrochloric acid is is used to detect group 1 cation i.e. $H g_{2}^{2 +}, P b^{2 +}, A g^{+}$

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