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NEET UG CHEMISTRY MCQ: CO-ORDINATION COMPOUNDS

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Analyzing +4 | -1
Which of the following statements is not correct?
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Correct option: D
The complexes [NiCl4]2−  and   [Ni(CN)4]2−{\left[ {\mathrm{NiC}{\mathrm{l}_4}} \right]^{2 - }}\mathrm{\;and}\,\mathrm{\;}{\left[ {\mathrm{Ni}{{\left( {\mathrm{CN}} \right)}_4}} \right]^{2 - }} differ in primary valencies of nickel.
Option D is correct because the primary valency (oxidation state) of nickel is +2 in both complexes. The difference lies in the secondary valency (coordination number), geometry, hybridization, and magnetic properties.

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