Among PbS, CuS, HgS, MnS, Ag_(2)S, NiS, CoS, Bi_(2)S_(3) and SnS_(2), total number of black coloured sulphides is :

Among PbS, CuS, HgS, MnS, Ag_(2)S, NiS, CoS, Bi_(2)S_(3) and SnS_(2),

1.	Among PbS, CuS, HgS, MnS, Ag_(2)S, NiS, CoS, Bi_(2)S_(3) and SnS_(2), total number of black coloured sulphides is :
Answer» Four Six Five Three Solution :`PbS, CUS, HGS, Ag_(2)S, NIS` and CoS are BLACK coloured.