Published by:
CGP EDU Academic Team
Published on: August 13, 2026
Passing 
gas into a mixture of 
, and 
ions in an acidified aqueous
solution precipitate
Text Solution
Verified by ExpertsThe correct answer is:
A
In the presence of HCl , dissociation of 
is suppressed (common ion effect), thus, 
]
ions present in solution are less. K sp of CuS and HgS is low, thus, the products of ionic concentration of 
become more than their respective K sp . Thus, only CuS and HgS are precipitated in presence of higher 
], i.e., in alkaline medium.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
Which of the following are the tests for sulphate ion?
The alkaline earth metal that imparts apple green colour to the Bunsen flame when
introduced in it …
What is the formula of copper metaborate?
The sodium extract on acidification with acetic acid and then adding lead acetate solution,
gives a…
The reaction used to distinguish between primary, secondary and tertiary alcohols is
Generally, it is more difficult to purify organic compounds than inorganic compounds
because