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Chemistry
Chemistry
Problem
Which of the following is not soluble in hot and conc.
HNO
3
\text{HNO}_3
HNO
3
? a.
PbS
\text{PbS}
PbS
b.
NiS
\text{NiS}
NiS
c.
CuS
\text{CuS}
CuS
d.
HgS
\text{HgS}
HgS
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