A) In acidic solutions hydration protects copper ions
B) In acidic solutions protons coordinate with ammonia molecules forming \[NH_{4}^{+}\] ions and \[N{{H}_{3}}\] molecules are not available
C) In alkaline solutions insoluble \[Cu{{(OH)}_{2}}\] is precipitated which is soluble in excess of any alkali
D) Copper hydroxide is an amphoteric substance
Correct Answer: B
Solution :
The pair of electron present with nitrogen will not be available to be donated as \[{{H}^{+}}\] will consume that one.
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