Question

Ammonia form the complex ion`[Cu(NH_(3))_(4)]^(2+)` with copper ions in the alkaline solution but not In acidic solution. What is the statement-2 for it?
A. In acidic solution hydration protect copper ions
B. In acidic solution protons co-ordinate with ammonia molecules forming `NH_(4)^(+)` ion and `NH_(3)` molecules are not available
C. In alkaline solution insolution `Cu(OH)_(2)` is precipitated which is soluble in excess of any alkali
D. Copper hydroxide is an amphoteric substance.

Answer 1

Correct Answer - 2
The pair of electrons present with nitrogen will not be available to be donates as `H^(+)` will consumed that one.