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Q.

Which one of the following metal sulphide has maximum solubility in water?

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a

HgS,Ksp=10−54

b

CdS,Ksp=10−30

c

FeS,Ksp=10−20

d

ZnS,Ksp=10−22

answer is C.

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Detailed Solution

FeShaving the solubility product  Ksp=10−20 has maximum solubility in water. Because greater the Ksp, the more the solubility.

Ksp is a measure of a concentration depending on variables such as temperature, pressure, and  composition.

Since the value of  Ksp is grater for ferrous sulphite,as a result FeS having the solubility product Hence, the option C is correct

 

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