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Potassium Permanganate

On reacting w...

Question

On reacting with $H_{2} S$ ,which of the following will form black coloured precipitate?

NaCl

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Cadmium chloride

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Zinc chloride

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Cupric chloride

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Solution

The correct option is D Cupric chloride
On heating with $H_{2} S$ cupric chloride form black coloured ppt. of $C u_{2} S$ . Copper(I) sulfide is a copper sulfide, a chemical compound of copper and sulfur. It has the chemical compound Cu₂S. It is found in nature as the mineral chalcocite.

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