1.

Which of the following statement is not true for the reaction given below: [Cu(H_(2)O)_(4)]^(2+)+ 4NH_(4) hArr [Cu(NH_(3))_(4)]^(2+)+4H_(2)O

Answer»

It is LIGAND substitution reaction
`NH_(3)` is a relatively strong FIELD ligand while `H_(2)O` is a weak field ligand
During the reaction, there is a change in colour from light blue to DARK blue
`[Cu(NH_(3))_(4)]^(2+)`, has a tetrahedral structure and is paramagnetic

Solution :In `[Cu(NH_(3))_(4)]^(2+),Cu^(2+)` is `dsp^(2)` hybridised, hence square is square PLANAR and complex is paramagnetic.


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