Ammonia forms the complex [Cu(NH)_3)_4]^ 2+ with copper ions in a… - Vidyadip

MCQ

Ammonia forms the complex $[Cu(NH)_3)_4]^{2+}$ with copper ions in alkaline solution but not in acidic solution. the reason for this is

A
In alkaline solution $Cu(OH)_2$ is precipitated which is soluble in excess of alkali
B
Copper hydroxide is amphoteric substance
C
In acidic solution hydration protects $Cu^{2+}$ ions
✓
In acidic solution protons are coordinated with ammonia molecules forming $NH_4^+$ ions

✓

Answer

Correct option: D.

In acidic solution protons are coordinated with ammonia molecules forming $NH_4^+$ ions

d
lone pair electrons of ammonia react with $H^+$ ione and convert in $NH_4^+$ ion which is not a ligand

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