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Identify the correct order of solubility...

Identify the correct order of solubility of `Na_2S`, CuS and ZnS in aqueous medium :

A

`CuS gt ZnS gt Na_2S`

B

`ZnS gt Na_2S gt CuS`

C

`Na_2S gt CuS gt ZnS`

D

`Na_2S gt ZnS gt CuS`.

Text Solution

Verified by Experts

The correct Answer is:
D
`K_(sp)` of Cus is less than Zns and therefore ZnS is more soluble.
The sodium salts are highly soluble in water .
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