A solution which is `10^(-3)` M each in `Mn^(2+), Fe^(2+), Zn^(2+)` and `Hg^(2+)` is treated with `10^(-16)` M sulphide

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Q 1109801718.     A solution which is `10^(-3)` M each in `Mn^(2+), Fe^(2+), Zn^(2+)` and `Hg^(2+)` is treated with `10^(-16)` M sulphide ion. If `K_(sp)` of `MnS, FeS, ZnS and HgS ` are `10^(-15), 10^(-23), 10^(-20)` and `10^(-54)` respectively, which one will precipitate first? (2003, 1M)
A

`HgS`

B

`ZnS`

C

`FeS`

D

`MgS`

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Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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