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Ammonia forms the complex ion [Cu(NH3)4]...

Ammonia forms the complex ion `[Cu(NH_3)_4]^(2+)` with copper ions in alkaline solutions but not in acidic solutions. The reason is

A

In acidic solutions hydration protects copper ions

B

In acidic solutions protons coordinate 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 substance.

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The correct Answer is:
B
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AAKASH SERIES-COMPLEX COMPOUNDS -Objective Exercise-2
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  2. Nickel combines with a uninegative monodentate ligand X to form a para...

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  3. Ammonia forms the complex ion [Cu(NH3)4]^(2+) with copper ions in alk...

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