Published by:
CGP EDU Academic Team
Published on: August 14, 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.
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