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Standard XII

Chemistry

Magnetic Properties

An aqueous so...

Question

An aqueous solution containing $H g_{2}^{2 +}, H g^{2 +}, P b^{2 +}, F e^{2 +}$ is treated with dil HCI. The cations that may be precipitate are __________.

H g_{2}^{2 +}

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H g^{2 +}

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P b^{2 +}

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F e^{2 +}

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Solution

The correct options are
A $H g_{2}^{2 +}$
C $P b^{2 +}$
$H g_{2}^{2 +} a n d P b^{2 +}$ give white precipitate with HCI viz $H g_{2} C l_{2} a n d P b C l_{2} . H g^{2 +}$ gives $H g C l_{2}$ which is soluble. Similarly, $F e C l_{2}$ is also soluble. So, cations that precipitates are $H g_{2}^{2 +} a n d P b^{2 +}$ .

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