Ammonia forms the complex `[Cu(NH_(3))_(4)]^(2+)` will copper ions in alkaline solution but not in acidic solution. The reason for this is

Options

A. In acidic solutions hydration protects copper ions.
B. In acidic solution protons co-ordinate with ammonia molecules forming `NH_(4)^(+)` ions and `NH_(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 substances.

Answer

B