Among `PbS, CuS, MnS, Ag_(2)S, NiS, CoS, Bi_(2)S_(3)` and `SnS_(2)` the total number
Channel: Doubtnut
Date: 2020-08-30

Among `PbS, CuS, MnS, Ag_(2)S, NiS, CoS, Bi_(2)S_(3)` and `SnS_(2)` the total number of block coloured sulphides is