Discussion Forum



1)

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


A) 7

B) 5

C) 6

D) 4

Answer:

Option A

Explanation:

From the qualitative  analysis of the  different metal ions, it is found that   PbS, CuS, HgS, MnS, Ag2S, NiS, CoS,  are black coloured

 MnS- dirty pink /buff coloured. SnS2-yellow coloured

 Bi2S2  - brown/black  (brownish-black) coloured 

  Hence, correct integer is (7)