A) In alkaline solution, insoluble \[Cu{{(OH)}_{2}}\] is precipitated, which is soluble in excess of any alkali
B) \[Cu{{(OH)}_{2}}\] is amphoteric.
C) In an acidic solution, hydration protects \[C{{u}^{2+}}\] ion.
D) In acidic solution, proton coordinates with \[N{{H}_{3}}\] forming \[N{{H}_{4}}^{+}\] is not available.
Correct Answer: D
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