Which of the following pairs of structure and magnetic properties is correct for the tetracyanonickelate$(II)$ ion?
- ASquare planar,paramagnetic
- BTetrahedral,diamagnetic
- CSquare planar,diamagnetic
- DTetrahedral,paramagnetic
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| $B. dsp^2$ | $(ii). [Ni(CO)_4]$ |
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| $D. d^2sp^3$ | $(iv). [CoF_6]^{3-}$ |
| $(v). [Fe(CO)_5]$ |
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