Engineering
Chemistry
Heating in Dry Test Tube
Distinction tests
Test of Cations and Anions
Question
How many number of total sulphides are brown or black, among the following
'X', 'Y', residue 'P' and 'Q'.
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Solution
'X' = PbCl2 (white)
'Y' = PbS (black)
Residue-'P'
CuS (black), PbS(black), HgS(black), CdS(yellow), Bi2S3 (brownish black)
Residue-'Q'
NiS, CoS (black)
MnS (pink)
ZnS(white)
FeS(black)