Analytical Chemistry Question 88

Question: Which compound does not dissolve in hot dilute $ HNO_3 $

[IIT 1996]

Options:

A) $ HgS $

B) $ PbS $

C) $ CuS $

D) $ CdS $

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Answer:

Correct Answer: A

Solution:

$ HgS\ +\ HNO_3\ \to \ \text{No reaction} $