what is value of x on the [Ni(CN)4]^x complex ion??

Dear student

x is =-2 in the complex
Please refer to the following link given below:

https://www.meritnation.com/ask-answer/question/explain-the-geometry-and-hybridisation-of-ni-cn-4-2/chemical-bonding-and-molecular-structure/6846732

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