Published by:
CGP EDU Academic Team
Published on: August 11, 2026
Ammonia forms the complex ion 
with copper ions in alkaline solutions but not in acidic solution. What is the reason for it
A
In acidic solutions hydration protects copper ions
B
In acidic solutions protons coordinate with ammonia molecules forming 
ions and 
molecules are not available
ions and molecules are not available
C
In alkaline solutions insoluble 
is precipitated which is soluble in excess of any alkali
is precipitated which is soluble in excess of any alkali
D
Copper hydroxide is an amphoteric substance
Text Solution
Verified by ExpertsThe correct answer is:
B
The pair of electron present with nitrogen will not be available to be donated as 
will consume that one.
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