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Question

Zinc chloride on treating with sodium sulphide forms a .................. colored Zn precipitate.

A
pink
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B
dense white
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C
black
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D
orange
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Solution

The correct option is B dense white
A solution of a zinc salt (Zinc Chloride sol.) was mixed with an equal amount of another solution, which give a physical change, usually a colour change due to a precipitation of the zinc insoluble compound.
ZnX(aq)+Na+Y(aq)Zn+Y(s)+Na+X(aq)
A DENSE WHITE ppt was formed on treating it with sodium sulphide.

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