Qualitative Analysis - Result Question 45
####48. Among PbS, CuS, $HgS, MnS, Ag _2 S, NiS, CoS, Bi _2 S _3$ and $SnS _2$ the total number of black coloured sulphides is
(2014 Adv.)
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Answer:
Correct Answer: 48. (6 or 7)
Solution:
- From qualitative analysis of the different metal ions it is found that $PbS, CuS, HgS, Ag _2 S, NiS, CoS$ are black coloured.
$MnS$ - dirty pink/buff coloured, $SnS _2$ - yellow coloured.
$Bi _2 S _3$ - brown/black (brownish black) coloured.
Hence, correct integer is (6 or 7).
