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Coordination Compounds question

2003 · Shift 0 · Q49

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JEE Main
Chemistry
Coordination Compounds
2003 · Shift 0 · Q49

Coordination Compounds question

2003 · Shift 0 · Q49

JEE MainChemistryCoordination CompoundsMCQ+4 / −1

Ammonia forms the complex ion

[Cu(NH_3)_4]^{2+}

with copper ions in alkaline solutions but not in acidic solutions. What is the reason for it?

A
In acidic solutions protons coordinate with ammonia molecules forming $NH^+_4$ ions and $NH_3$ molecules are not available
B
In alkaline solutions insoluble $Cu(OH)_2$ is precipitated which is soluble in excess of any alkali
C
Copper hydroxide is an amphoteric substance
D
In acidic solutions hydration protects copper ions.

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