d and f block elements

Section: Chemistry

Question : 18 of 24

Marks: +1, -0

Among PbS, CuS, HgS, MnS, Ag‌2S, NiS, CoS, Bi‌2S‌3 and SnS‌2, the total number of BLACK coloured sulphides is

[JEE Adv 2014 P1]

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