Published by:
CGP EDU Academic Team
Published on: August 14, 2026
When excess of aqueous KCN solutions is added to an aqueous solutions of copper sulphate, the complex 
is formed. On passing 
gas through this solutions no precipitate of CuS is formed because
A
Sulphide ions cannot replace 
ions
ions
B
does not give 
ion in the solutions
C
Sulphide ions from 
do not form complexes
do not form complexes
D
Sulphide ions cannot replace sulphate ions from copper sulphate solutions.
Text Solution
Verified by ExpertsThe correct answer is:
B
When excess of aqueous KCN solutions is added to aqueous 
Solutions, highly stable 
is formed which does not give 
ion in the solution, hence copper sulphide is not formed. 
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
Copper sulphate dissolves in ammonia due ot the formations of
The number of ions give by in aqueous solutions will be
Which of the following ligands forms a chelate?
Which of the following is not a neutral ligand?
Which of the following ligands will not show chelation?
The complex ion which has no -electrons in the central metal atom is