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Deliquescence and Alkaline Earth Metal Halides

Passing H2S g...

Question

Passing $H_{2} S$ gas into a mixture of $M n^{2 +}, N i^{2 +}, C u^{2 +} and H g^{2 +}$ ions in an acidified aqueous solution precipitates

N i S and H g S

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M n S and N i S

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M n S and C u S

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C u S and H g S

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Solution

The correct option is D $C u S and H g S$
$C u^{+ 2} and H g^{+ 2}$ belong to $2^{n d}$ group of basic radicals.

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