1.

A solution which is 0.001 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)and10^(-54) respectively, which one will precipitate first ?

Answer»

FeS
MgS
HgS
ZnS

Answer :C


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