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

Chemistry · Coordination Compounds

JEE Main 2026 — 23 January, Morning Shift — Question 60

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

A. It is red in colour

B. It has a high solubility in water at $\mathrm{pH}=9$

C. The Ni ion has two unpaired d-electrons

D. The $\mathrm{N}-\mathrm{Ni}-\mathrm{N}$ bond angle is almost close to $90^{\circ}$

E. The complex contains four five-membered metallacycles (metal containing rings)

Choose the correct answer from the options given below:

Option A:
C and E only
Option B:
A, D and B only
Option C:
B, C and E only
Correct
Option D:
C and D only

Answer: C

Step-by-step solution

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) $\mathrm{Ni}^{+2}: 3 d^{8}$

Hybridisation : $\mathrm{dsp}^{2}$ Unpaired $\mathrm{e}^{-}=0$ Geometry : Square planar D) $\mathrm{N}-\mathrm{Ni}-\mathrm{N}$ Bond angle is close to $90^{\circ}$ E) 2 five membered metal containing rings are formed.

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Exam: JEE Main 2026
Paper: 23 January, Morning Shift
Subject: Chemistry
Chapter: Coordination Compounds
Topic: Properties and importance of Coordination Complexes

Answer: C

Step-by-step solution

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