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`

Options

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

Answer

B

Explanation

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