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Solution


Q.

The statements that are incorrect about the nickel(II) complex of dimethylglyoxime are:                 [2026]

A. It is red in colour.
B. It has a high solubility in water at pH = 9.
C. The Ni ion has two unpaired d-electrons.
D. The N–Ni–N bond angle is almost close to 90°.
E. The complex contains four five-membered metallacycles (metal-containing rings).

Choose the correct answer from the options given below:
1 C and E only  
2 A, D and B only  
3 C and D only  
4 B, C and E only  

Ans.

(4)

In the above complex, Ni is present in +2 oxidation number.

A) It is rosy red ppt

B) It is precipitated in basic medium

C) Ni+2:3d8

Hybridisation : dsp2

Unpaired e- = 0

Geometry : Square planar

D) N–Ni–N bond angle is close to 90°

E) 2 five membered metal containing rings are formed.